Merge tag 'usb-for-v3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/balbi/usb into usb-next

Felipe writes:

usb: patches for v3.16 merge window

Not a lot here during this merge window. Mostly we just have
the usual miscellaneous patches (removal of unnecessary prints,
proper dependencies being added to Kconfig, build warning fixes,
new device ID, etc.

Other than those, the only important new features are the
new support for OS Strings which should help Linux Gadget
Drivers behave better under MS Windows. Also Babble Recovery
implementation for MUSB on AM335x. Lastly, we also have
ARCH_QCOM PHY support though phy-msm.

Signed-of-by: Felipe Balbi <balbi@ti.com>

Conflicts:
	drivers/usb/phy/phy-mv-u3d-usb.c

28 files changed, 1148 insertions, 184 deletions

diff --git a/drivers/usb/gadget/atmel_usba_udc.c b/drivers/usb/gadget/atmel_usba_udc.c
index 9f65324f9ae0..76023ce449a3 100644
--- a/drivers/usb/gadget/atmel_usba_udc.c
+++ b/drivers/usb/gadget/atmel_usba_udc.c
@@ -1686,7 +1686,7 @@ static irqreturn_t usba_udc_irq(int irq, void *devid)
 		reset_all_endpoints(udc);
 
 		if (udc->gadget.speed != USB_SPEED_UNKNOWN
-				&& udc->driver->disconnect) {
+				&& udc->driver && udc->driver->disconnect) {
 			udc->gadget.speed = USB_SPEED_UNKNOWN;
 			spin_unlock(&udc->lock);
 			udc->driver->disconnect(&udc->gadget);
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index fab906429b80..042c66b71df8 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -21,6 +21,24 @@
 #include <linux/usb/composite.h>
 #include <asm/unaligned.h>
 
+#include "u_os_desc.h"
+
+/**
+ * struct usb_os_string - represents OS String to be reported by a gadget
+ * @bLength: total length of the entire descritor, always 0x12
+ * @bDescriptorType: USB_DT_STRING
+ * @qwSignature: the OS String proper
+ * @bMS_VendorCode: code used by the host for subsequent requests
+ * @bPad: not used, must be zero
+ */
+struct usb_os_string {
+	__u8	bLength;
+	__u8	bDescriptorType;
+	__u8	qwSignature[OS_STRING_QW_SIGN_LEN];
+	__u8	bMS_VendorCode;
+	__u8	bPad;
+} __packed;
+
 /*
  * The code in this file is utility code, used to build a gadget driver
  * from one or more "function" drivers, one or more "configuration"
@@ -422,6 +440,7 @@ static int config_desc(struct usb_composite_dev *cdev, unsigned w_value)
 {
 	struct usb_gadget		*gadget = cdev->gadget;
 	struct usb_configuration	*c;
+	struct list_head		*pos;
 	u8				type = w_value >> 8;
 	enum usb_device_speed		speed = USB_SPEED_UNKNOWN;
 
@@ -440,7 +459,20 @@ static int config_desc(struct usb_composite_dev *cdev, unsigned w_value)
 
 	/* This is a lookup by config *INDEX* */
 	w_value &= 0xff;
-	list_for_each_entry(c, &cdev->configs, list) {
+
+	pos = &cdev->configs;
+	c = cdev->os_desc_config;
+	if (c)
+		goto check_config;
+
+	while ((pos = pos->next) !=  &cdev->configs) {
+		c = list_entry(pos, typeof(*c), list);
+
+		/* skip OS Descriptors config which is handled separately */
+		if (c == cdev->os_desc_config)
+			continue;
+
+check_config:
 		/* ignore configs that won't work at this speed */
 		switch (speed) {
 		case USB_SPEED_SUPER:
@@ -634,6 +666,7 @@ static int set_config(struct usb_composite_dev *cdev,
 	if (!c)
 		goto done;
 
+	usb_gadget_set_state(gadget, USB_STATE_CONFIGURED);
 	cdev->config = c;
 
 	/* Initialize all interfaces by setting them to altsetting zero. */
@@ -960,6 +993,19 @@ static int get_string(struct usb_composite_dev *cdev,
 		return s->bLength;
 	}
 
+	if (cdev->use_os_string && language == 0 && id == OS_STRING_IDX) {
+		struct usb_os_string *b = buf;
+		b->bLength = sizeof(*b);
+		b->bDescriptorType = USB_DT_STRING;
+		compiletime_assert(
+			sizeof(b->qwSignature) == sizeof(cdev->qw_sign),
+			"qwSignature size must be equal to qw_sign");
+		memcpy(&b->qwSignature, cdev->qw_sign, sizeof(b->qwSignature));
+		b->bMS_VendorCode = cdev->b_vendor_code;
+		b->bPad = 0;
+		return sizeof(*b);
+	}
+
 	list_for_each_entry(uc, &cdev->gstrings, list) {
 		struct usb_gadget_strings **sp;
 
@@ -1206,6 +1252,158 @@ static void composite_setup_complete(struct usb_ep *ep, struct usb_request *req)
 				req->status, req->actual, req->length);
 }
 
+static int count_ext_compat(struct usb_configuration *c)
+{
+	int i, res;
+
+	res = 0;
+	for (i = 0; i < c->next_interface_id; ++i) {
+		struct usb_function *f;
+		int j;
+
+		f = c->interface[i];
+		for (j = 0; j < f->os_desc_n; ++j) {
+			struct usb_os_desc *d;
+
+			if (i != f->os_desc_table[j].if_id)
+				continue;
+			d = f->os_desc_table[j].os_desc;
+			if (d && d->ext_compat_id)
+				++res;
+		}
+	}
+	BUG_ON(res > 255);
+	return res;
+}
+
+static void fill_ext_compat(struct usb_configuration *c, u8 *buf)
+{
+	int i, count;
+
+	count = 16;
+	for (i = 0; i < c->next_interface_id; ++i) {
+		struct usb_function *f;
+		int j;
+
+		f = c->interface[i];
+		for (j = 0; j < f->os_desc_n; ++j) {
+			struct usb_os_desc *d;
+
+			if (i != f->os_desc_table[j].if_id)
+				continue;
+			d = f->os_desc_table[j].os_desc;
+			if (d && d->ext_compat_id) {
+				*buf++ = i;
+				*buf++ = 0x01;
+				memcpy(buf, d->ext_compat_id, 16);
+				buf += 22;
+			} else {
+				++buf;
+				*buf = 0x01;
+				buf += 23;
+			}
+			count += 24;
+			if (count >= 4096)
+				return;
+		}
+	}
+}
+
+static int count_ext_prop(struct usb_configuration *c, int interface)
+{
+	struct usb_function *f;
+	int j, res;
+
+	res = 0;
+
+	f = c->interface[interface];
+	for (j = 0; j < f->os_desc_n; ++j) {
+		struct usb_os_desc *d;
+
+		if (interface != f->os_desc_table[j].if_id)
+			continue;
+		d = f->os_desc_table[j].os_desc;
+		if (d && d->ext_compat_id)
+			return d->ext_prop_count;
+	}
+	return res;
+}
+
+static int len_ext_prop(struct usb_configuration *c, int interface)
+{
+	struct usb_function *f;
+	struct usb_os_desc *d;
+	int j, res;
+
+	res = 10; /* header length */
+	f = c->interface[interface];
+	for (j = 0; j < f->os_desc_n; ++j) {
+		if (interface != f->os_desc_table[j].if_id)
+			continue;
+		d = f->os_desc_table[j].os_desc;
+		if (d)
+			return min(res + d->ext_prop_len, 4096);
+	}
+	return res;
+}
+
+static int fill_ext_prop(struct usb_configuration *c, int interface, u8 *buf)
+{
+	struct usb_function *f;
+	struct usb_os_desc *d;
+	struct usb_os_desc_ext_prop *ext_prop;
+	int j, count, n, ret;
+	u8 *start = buf;
+
+	f = c->interface[interface];
+	for (j = 0; j < f->os_desc_n; ++j) {
+		if (interface != f->os_desc_table[j].if_id)
+			continue;
+		d = f->os_desc_table[j].os_desc;
+		if (d)
+			list_for_each_entry(ext_prop, &d->ext_prop, entry) {
+				/* 4kB minus header length */
+				n = buf - start;
+				if (n >= 4086)
+					return 0;
+
+				count = ext_prop->data_len +
+					ext_prop->name_len + 14;
+				if (count > 4086 - n)
+					return -EINVAL;
+				usb_ext_prop_put_size(buf, count);
+				usb_ext_prop_put_type(buf, ext_prop->type);
+				ret = usb_ext_prop_put_name(buf, ext_prop->name,
+							    ext_prop->name_len);
+				if (ret < 0)
+					return ret;
+				switch (ext_prop->type) {
+				case USB_EXT_PROP_UNICODE:
+				case USB_EXT_PROP_UNICODE_ENV:
+				case USB_EXT_PROP_UNICODE_LINK:
+					usb_ext_prop_put_unicode(buf, ret,
+							 ext_prop->data,
+							 ext_prop->data_len);
+					break;
+				case USB_EXT_PROP_BINARY:
+					usb_ext_prop_put_binary(buf, ret,
+							ext_prop->data,
+							ext_prop->data_len);
+					break;
+				case USB_EXT_PROP_LE32:
+					/* not implemented */
+				case USB_EXT_PROP_BE32:
+					/* not implemented */
+				default:
+					return -EINVAL;
+				}
+				buf += count;
+			}
+	}
+
+	return 0;
+}
+
 /*
  * The setup() callback implements all the ep0 functionality that's
  * not handled lower down, in hardware or the hardware driver(like
@@ -1415,6 +1613,91 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 		break;
 	default:
 unknown:
+		/*
+		 * OS descriptors handling
+		 */
+		if (cdev->use_os_string && cdev->os_desc_config &&
+		    (ctrl->bRequest & USB_TYPE_VENDOR) &&
+		    ctrl->bRequest == cdev->b_vendor_code) {
+			struct usb_request		*req;
+			struct usb_configuration	*os_desc_cfg;
+			u8				*buf;
+			int				interface;
+			int				count = 0;
+
+			req = cdev->os_desc_req;
+			req->complete = composite_setup_complete;
+			buf = req->buf;
+			os_desc_cfg = cdev->os_desc_config;
+			memset(buf, 0, w_length);
+			buf[5] = 0x01;
+			switch (ctrl->bRequestType & USB_RECIP_MASK) {
+			case USB_RECIP_DEVICE:
+				if (w_index != 0x4 || (w_value >> 8))
+					break;
+				buf[6] = w_index;
+				if (w_length == 0x10) {
+					/* Number of ext compat interfaces */
+					count = count_ext_compat(os_desc_cfg);
+					buf[8] = count;
+					count *= 24; /* 24 B/ext compat desc */
+					count += 16; /* header */
+					put_unaligned_le32(count, buf);
+					value = w_length;
+				} else {
+					/* "extended compatibility ID"s */
+					count = count_ext_compat(os_desc_cfg);
+					buf[8] = count;
+					count *= 24; /* 24 B/ext compat desc */
+					count += 16; /* header */
+					put_unaligned_le32(count, buf);
+					buf += 16;
+					fill_ext_compat(os_desc_cfg, buf);
+					value = w_length;
+				}
+				break;
+			case USB_RECIP_INTERFACE:
+				if (w_index != 0x5 || (w_value >> 8))
+					break;
+				interface = w_value & 0xFF;
+				buf[6] = w_index;
+				if (w_length == 0x0A) {
+					count = count_ext_prop(os_desc_cfg,
+						interface);
+					put_unaligned_le16(count, buf + 8);
+					count = len_ext_prop(os_desc_cfg,
+						interface);
+					put_unaligned_le32(count, buf);
+
+					value = w_length;
+				} else {
+					count = count_ext_prop(os_desc_cfg,
+						interface);
+					put_unaligned_le16(count, buf + 8);
+					count = len_ext_prop(os_desc_cfg,
+						interface);
+					put_unaligned_le32(count, buf);
+					buf += 10;
+					value = fill_ext_prop(os_desc_cfg,
+							      interface, buf);
+					if (value < 0)
+						return value;
+
+					value = w_length;
+				}
+				break;
+			}
+			req->length = value;
+			req->zero = value < w_length;
+			value = usb_ep_queue(gadget->ep0, req, GFP_ATOMIC);
+			if (value < 0) {
+				DBG(cdev, "ep_queue --> %d\n", value);
+				req->status = 0;
+				composite_setup_complete(gadget->ep0, req);
+			}
+			return value;
+		}
+
 		VDBG(cdev,
 			"non-core control req%02x.%02x v%04x i%04x l%d\n",
 			ctrl->bRequestType, ctrl->bRequest,
@@ -1638,6 +1921,29 @@ fail:
 	return ret;
 }
 
+int composite_os_desc_req_prepare(struct usb_composite_dev *cdev,
+				  struct usb_ep *ep0)
+{
+	int ret = 0;
+
+	cdev->os_desc_req = usb_ep_alloc_request(ep0, GFP_KERNEL);
+	if (!cdev->os_desc_req) {
+		ret = PTR_ERR(cdev->os_desc_req);
+		goto end;
+	}
+
+	/* OS feature descriptor length <= 4kB */
+	cdev->os_desc_req->buf = kmalloc(4096, GFP_KERNEL);
+	if (!cdev->os_desc_req->buf) {
+		ret = PTR_ERR(cdev->os_desc_req->buf);
+		kfree(cdev->os_desc_req);
+		goto end;
+	}
+	cdev->os_desc_req->complete = composite_setup_complete;
+end:
+	return ret;
+}
+
 void composite_dev_cleanup(struct usb_composite_dev *cdev)
 {
 	struct usb_gadget_string_container *uc, *tmp;
@@ -1646,6 +1952,10 @@ void composite_dev_cleanup(struct usb_composite_dev *cdev)
 		list_del(&uc->list);
 		kfree(uc);
 	}
+	if (cdev->os_desc_req) {
+		kfree(cdev->os_desc_req->buf);
+		usb_ep_free_request(cdev->gadget->ep0, cdev->os_desc_req);
+	}
 	if (cdev->req) {
 		kfree(cdev->req->buf);
 		usb_ep_free_request(cdev->gadget->ep0, cdev->req);
@@ -1683,6 +1993,12 @@ static int composite_bind(struct usb_gadget *gadget,
 	if (status < 0)
 		goto fail;
 
+	if (cdev->use_os_string) {
+		status = composite_os_desc_req_prepare(cdev, gadget->ep0);
+		if (status)
+			goto fail;
+	}
+
 	update_unchanged_dev_desc(&cdev->desc, composite->dev);
 
 	/* has userspace failed to provide a serial number? */
diff --git a/drivers/usb/gadget/configfs.c b/drivers/usb/gadget/configfs.c
index 7d1cc01796b6..2ddcd635ca2a 100644
--- a/drivers/usb/gadget/configfs.c
+++ b/drivers/usb/gadget/configfs.c
@@ -2,9 +2,12 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/device.h>
+#include <linux/nls.h>
 #include <linux/usb/composite.h>
 #include <linux/usb/gadget_configfs.h>
 #include "configfs.h"
+#include "u_f.h"
+#include "u_os_desc.h"
 
 int check_user_usb_string(const char *name,
 		struct usb_gadget_strings *stringtab_dev)
@@ -43,7 +46,8 @@ struct gadget_info {
 	struct config_group functions_group;
 	struct config_group configs_group;
 	struct config_group strings_group;
-	struct config_group *default_groups[4];
+	struct config_group os_desc_group;
+	struct config_group *default_groups[5];
 
 	struct mutex lock;
 	struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1];
@@ -56,6 +60,9 @@ struct gadget_info {
 #endif
 	struct usb_composite_driver composite;
 	struct usb_composite_dev cdev;
+	bool use_os_desc;
+	char b_vendor_code;
+	char qw_sign[OS_STRING_QW_SIGN_LEN];
 };
 
 struct config_usb_cfg {
@@ -79,6 +86,10 @@ struct gadget_strings {
 	struct list_head list;
 };
 
+struct os_desc {
+	struct config_group group;
+};
+
 struct gadget_config_name {
 	struct usb_gadget_strings stringtab_dev;
 	struct usb_string strings;
@@ -736,6 +747,525 @@ static void gadget_strings_attr_release(struct config_item *item)
 USB_CONFIG_STRING_RW_OPS(gadget_strings);
 USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info);
 
+static inline struct os_desc *to_os_desc(struct config_item *item)
+{
+	return container_of(to_config_group(item), struct os_desc, group);
+}
+
+CONFIGFS_ATTR_STRUCT(os_desc);
+CONFIGFS_ATTR_OPS(os_desc);
+
+static ssize_t os_desc_use_show(struct os_desc *os_desc, char *page)
+{
+	struct gadget_info *gi;
+
+	gi = to_gadget_info(os_desc->group.cg_item.ci_parent);
+
+	return sprintf(page, "%d", gi->use_os_desc);
+}
+
+static ssize_t os_desc_use_store(struct os_desc *os_desc, const char *page,
+				 size_t len)
+{
+	struct gadget_info *gi;
+	int ret;
+	bool use;
+
+	gi = to_gadget_info(os_desc->group.cg_item.ci_parent);
+
+	mutex_lock(&gi->lock);
+	ret = strtobool(page, &use);
+	if (!ret) {
+		gi->use_os_desc = use;
+		ret = len;
+	}
+	mutex_unlock(&gi->lock);
+
+	return ret;
+}
+
+static struct os_desc_attribute os_desc_use =
+	__CONFIGFS_ATTR(use, S_IRUGO | S_IWUSR,
+			os_desc_use_show,
+			os_desc_use_store);
+
+static ssize_t os_desc_b_vendor_code_show(struct os_desc *os_desc, char *page)
+{
+	struct gadget_info *gi;
+
+	gi = to_gadget_info(os_desc->group.cg_item.ci_parent);
+
+	return sprintf(page, "%d", gi->b_vendor_code);
+}
+
+static ssize_t os_desc_b_vendor_code_store(struct os_desc *os_desc,
+					   const char *page, size_t len)
+{
+	struct gadget_info *gi;
+	int ret;
+	u8 b_vendor_code;
+
+	gi = to_gadget_info(os_desc->group.cg_item.ci_parent);
+
+	mutex_lock(&gi->lock);
+	ret = kstrtou8(page, 0, &b_vendor_code);
+	if (!ret) {
+		gi->b_vendor_code = b_vendor_code;
+		ret = len;
+	}
+	mutex_unlock(&gi->lock);
+
+	return ret;
+}
+
+static struct os_desc_attribute os_desc_b_vendor_code =
+	__CONFIGFS_ATTR(b_vendor_code, S_IRUGO | S_IWUSR,
+			os_desc_b_vendor_code_show,
+			os_desc_b_vendor_code_store);
+
+static ssize_t os_desc_qw_sign_show(struct os_desc *os_desc, char *page)
+{
+	struct gadget_info *gi;
+
+	gi = to_gadget_info(os_desc->group.cg_item.ci_parent);
+
+	memcpy(page, gi->qw_sign, OS_STRING_QW_SIGN_LEN);
+
+	return OS_STRING_QW_SIGN_LEN;
+}
+
+static ssize_t os_desc_qw_sign_store(struct os_desc *os_desc, const char *page,
+				     size_t len)
+{
+	struct gadget_info *gi;
+	int res, l;
+
+	gi = to_gadget_info(os_desc->group.cg_item.ci_parent);
+	l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1);
+	if (page[l - 1] == '\n')
+		--l;
+
+	mutex_lock(&gi->lock);
+	res = utf8s_to_utf16s(page, l,
+			      UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign,
+			      OS_STRING_QW_SIGN_LEN);
+	if (res > 0)
+		res = len;
+	mutex_unlock(&gi->lock);
+
+	return res;
+}
+
+static struct os_desc_attribute os_desc_qw_sign =
+	__CONFIGFS_ATTR(qw_sign, S_IRUGO | S_IWUSR,
+			os_desc_qw_sign_show,
+			os_desc_qw_sign_store);
+
+static struct configfs_attribute *os_desc_attrs[] = {
+	&os_desc_use.attr,
+	&os_desc_b_vendor_code.attr,
+	&os_desc_qw_sign.attr,
+	NULL,
+};
+
+static void os_desc_attr_release(struct config_item *item)
+{
+	struct os_desc *os_desc = to_os_desc(item);
+	kfree(os_desc);
+}
+
+static int os_desc_link(struct config_item *os_desc_ci,
+			struct config_item *usb_cfg_ci)
+{
+	struct gadget_info *gi = container_of(to_config_group(os_desc_ci),
+					struct gadget_info, os_desc_group);
+	struct usb_composite_dev *cdev = &gi->cdev;
+	struct config_usb_cfg *c_target =
+		container_of(to_config_group(usb_cfg_ci),
+			     struct config_usb_cfg, group);
+	struct usb_configuration *c;
+	int ret;
+
+	mutex_lock(&gi->lock);
+	list_for_each_entry(c, &cdev->configs, list) {
+		if (c == &c_target->c)
+			break;
+	}
+	if (c != &c_target->c) {
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (cdev->os_desc_config) {
+		ret = -EBUSY;
+		goto out;
+	}
+
+	cdev->os_desc_config = &c_target->c;
+	ret = 0;
+
+out:
+	mutex_unlock(&gi->lock);
+	return ret;
+}
+
+static int os_desc_unlink(struct config_item *os_desc_ci,
+			  struct config_item *usb_cfg_ci)
+{
+	struct gadget_info *gi = container_of(to_config_group(os_desc_ci),
+					struct gadget_info, os_desc_group);
+	struct usb_composite_dev *cdev = &gi->cdev;
+
+	mutex_lock(&gi->lock);
+	if (gi->udc_name)
+		unregister_gadget(gi);
+	cdev->os_desc_config = NULL;
+	WARN_ON(gi->udc_name);
+	mutex_unlock(&gi->lock);
+	return 0;
+}
+
+static struct configfs_item_operations os_desc_ops = {
+	.release                = os_desc_attr_release,
+	.show_attribute         = os_desc_attr_show,
+	.store_attribute        = os_desc_attr_store,
+	.allow_link		= os_desc_link,
+	.drop_link		= os_desc_unlink,
+};
+
+static struct config_item_type os_desc_type = {
+	.ct_item_ops	= &os_desc_ops,
+	.ct_attrs	= os_desc_attrs,
+	.ct_owner	= THIS_MODULE,
+};
+
+CONFIGFS_ATTR_STRUCT(usb_os_desc);
+CONFIGFS_ATTR_OPS(usb_os_desc);
+
+
+static inline struct usb_os_desc_ext_prop
+*to_usb_os_desc_ext_prop(struct config_item *item)
+{
+	return container_of(item, struct usb_os_desc_ext_prop, item);
+}
+
+CONFIGFS_ATTR_STRUCT(usb_os_desc_ext_prop);
+CONFIGFS_ATTR_OPS(usb_os_desc_ext_prop);
+
+static ssize_t ext_prop_type_show(struct usb_os_desc_ext_prop *ext_prop,
+				  char *page)
+{
+	return sprintf(page, "%d", ext_prop->type);
+}
+
+static ssize_t ext_prop_type_store(struct usb_os_desc_ext_prop *ext_prop,
+				   const char *page, size_t len)
+{
+	struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent);
+	u8 type;
+	int ret;
+
+	if (desc->opts_mutex)
+		mutex_lock(desc->opts_mutex);
+	ret = kstrtou8(page, 0, &type);
+	if (ret)
+		goto end;
+	if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) {
+		ret = -EINVAL;
+		goto end;
+	}
+
+	if ((ext_prop->type == USB_EXT_PROP_BINARY ||
+	    ext_prop->type == USB_EXT_PROP_LE32 ||
+	    ext_prop->type == USB_EXT_PROP_BE32) &&
+	    (type == USB_EXT_PROP_UNICODE ||
+	    type == USB_EXT_PROP_UNICODE_ENV ||
+	    type == USB_EXT_PROP_UNICODE_LINK))
+		ext_prop->data_len <<= 1;
+	else if ((ext_prop->type == USB_EXT_PROP_UNICODE ||
+		   ext_prop->type == USB_EXT_PROP_UNICODE_ENV ||
+		   ext_prop->type == USB_EXT_PROP_UNICODE_LINK) &&
+		   (type == USB_EXT_PROP_BINARY ||
+		   type == USB_EXT_PROP_LE32 ||
+		   type == USB_EXT_PROP_BE32))
+		ext_prop->data_len >>= 1;
+	ext_prop->type = type;
+	ret = len;
+
+end:
+	if (desc->opts_mutex)
+		mutex_unlock(desc->opts_mutex);
+	return ret;
+}
+
+static ssize_t ext_prop_data_show(struct usb_os_desc_ext_prop *ext_prop,
+				  char *page)
+{
+	int len = ext_prop->data_len;
+
+	if (ext_prop->type == USB_EXT_PROP_UNICODE ||
+	    ext_prop->type == USB_EXT_PROP_UNICODE_ENV ||
+	    ext_prop->type == USB_EXT_PROP_UNICODE_LINK)
+		len >>= 1;
+	memcpy(page, ext_prop->data, len);
+
+	return len;
+}
+
+static ssize_t ext_prop_data_store(struct usb_os_desc_ext_prop *ext_prop,
+				   const char *page, size_t len)
+{
+	struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent);
+	char *new_data;
+	size_t ret_len = len;
+
+	if (page[len - 1] == '\n' || page[len - 1] == '\0')
+		--len;
+	new_data = kzalloc(len, GFP_KERNEL);
+	if (!new_data)
+		return -ENOMEM;
+
+	memcpy(new_data, page, len);
+
+	if (desc->opts_mutex)
+		mutex_lock(desc->opts_mutex);
+	kfree(ext_prop->data);
+	ext_prop->data = new_data;
+	desc->ext_prop_len -= ext_prop->data_len;
+	ext_prop->data_len = len;
+	desc->ext_prop_len += ext_prop->data_len;
+	if (ext_prop->type == USB_EXT_PROP_UNICODE ||
+	    ext_prop->type == USB_EXT_PROP_UNICODE_ENV ||
+	    ext_prop->type == USB_EXT_PROP_UNICODE_LINK) {
+		desc->ext_prop_len -= ext_prop->data_len;
+		ext_prop->data_len <<= 1;
+		ext_prop->data_len += 2;
+		desc->ext_prop_len += ext_prop->data_len;
+	}
+	if (desc->opts_mutex)
+		mutex_unlock(desc->opts_mutex);
+	return ret_len;
+}
+
+static struct usb_os_desc_ext_prop_attribute ext_prop_type =
+	__CONFIGFS_ATTR(type, S_IRUGO | S_IWUSR,
+			ext_prop_type_show, ext_prop_type_store);
+
+static struct usb_os_desc_ext_prop_attribute ext_prop_data =
+	__CONFIGFS_ATTR(data, S_IRUGO | S_IWUSR,
+			ext_prop_data_show, ext_prop_data_store);
+
+static struct configfs_attribute *ext_prop_attrs[] = {
+	&ext_prop_type.attr,
+	&ext_prop_data.attr,
+	NULL,
+};
+
+static void usb_os_desc_ext_prop_release(struct config_item *item)
+{
+	struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item);
+
+	kfree(ext_prop); /* frees a whole chunk */
+}
+
+static struct configfs_item_operations ext_prop_ops = {
+	.release		= usb_os_desc_ext_prop_release,
+	.show_attribute		= usb_os_desc_ext_prop_attr_show,
+	.store_attribute	= usb_os_desc_ext_prop_attr_store,
+};
+
+static struct config_item *ext_prop_make(
+		struct config_group *group,
+		const char *name)
+{
+	struct usb_os_desc_ext_prop *ext_prop;
+	struct config_item_type *ext_prop_type;
+	struct usb_os_desc *desc;
+	char *vlabuf;
+
+	vla_group(data_chunk);
+	vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1);
+	vla_item(data_chunk, struct config_item_type, ext_prop_type, 1);
+
+	vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL);
+	if (!vlabuf)
+		return ERR_PTR(-ENOMEM);
+
+	ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop);
+	ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type);
+
+	desc = container_of(group, struct usb_os_desc, group);
+	ext_prop_type->ct_item_ops = &ext_prop_ops;
+	ext_prop_type->ct_attrs = ext_prop_attrs;
+	ext_prop_type->ct_owner = desc->owner;
+
+	config_item_init_type_name(&ext_prop->item, name, ext_prop_type);
+
+	ext_prop->name = kstrdup(name, GFP_KERNEL);
+	if (!ext_prop->name) {
+		kfree(vlabuf);
+		return ERR_PTR(-ENOMEM);
+	}
+	desc->ext_prop_len += 14;
+	ext_prop->name_len = 2 * strlen(ext_prop->name) + 2;
+	if (desc->opts_mutex)
+		mutex_lock(desc->opts_mutex);
+	desc->ext_prop_len += ext_prop->name_len;
+	list_add_tail(&ext_prop->entry, &desc->ext_prop);
+	++desc->ext_prop_count;
+	if (desc->opts_mutex)
+		mutex_unlock(desc->opts_mutex);
+
+	return &ext_prop->item;
+}
+
+static void ext_prop_drop(struct config_group *group, struct config_item *item)
+{
+	struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item);
+	struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item);
+
+	if (desc->opts_mutex)
+		mutex_lock(desc->opts_mutex);
+	list_del(&ext_prop->entry);
+	--desc->ext_prop_count;
+	kfree(ext_prop->name);
+	desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14);
+	if (desc->opts_mutex)
+		mutex_unlock(desc->opts_mutex);
+	config_item_put(item);
+}
+
+static struct configfs_group_operations interf_grp_ops = {
+	.make_item	= &ext_prop_make,
+	.drop_item	= &ext_prop_drop,
+};
+
+static struct configfs_item_operations interf_item_ops = {
+	.show_attribute		= usb_os_desc_attr_show,
+	.store_attribute	= usb_os_desc_attr_store,
+};
+
+static ssize_t rndis_grp_compatible_id_show(struct usb_os_desc *desc,
+					    char *page)
+{
+	memcpy(page, desc->ext_compat_id, 8);
+	return 8;
+}
+
+static ssize_t rndis_grp_compatible_id_store(struct usb_os_desc *desc,
+					     const char *page, size_t len)
+{
+	int l;
+
+	l = min_t(int, 8, len);
+	if (page[l - 1] == '\n')
+		--l;
+	if (desc->opts_mutex)
+		mutex_lock(desc->opts_mutex);
+	memcpy(desc->ext_compat_id, page, l);
+	desc->ext_compat_id[l] = '\0';
+
+	if (desc->opts_mutex)
+		mutex_unlock(desc->opts_mutex);
+
+	return len;
+}
+
+static struct usb_os_desc_attribute rndis_grp_attr_compatible_id =
+	__CONFIGFS_ATTR(compatible_id, S_IRUGO | S_IWUSR,
+			rndis_grp_compatible_id_show,
+			rndis_grp_compatible_id_store);
+
+static ssize_t rndis_grp_sub_compatible_id_show(struct usb_os_desc *desc,
+						char *page)
+{
+	memcpy(page, desc->ext_compat_id + 8, 8);
+	return 8;
+}
+
+static ssize_t rndis_grp_sub_compatible_id_store(struct usb_os_desc *desc,
+						 const char *page, size_t len)
+{
+	int l;
+
+	l = min_t(int, 8, len);
+	if (page[l - 1] == '\n')
+		--l;
+	if (desc->opts_mutex)
+		mutex_lock(desc->opts_mutex);
+	memcpy(desc->ext_compat_id + 8, page, l);
+	desc->ext_compat_id[l + 8] = '\0';
+
+	if (desc->opts_mutex)
+		mutex_unlock(desc->opts_mutex);
+
+	return len;
+}
+
+static struct usb_os_desc_attribute rndis_grp_attr_sub_compatible_id =
+	__CONFIGFS_ATTR(sub_compatible_id, S_IRUGO | S_IWUSR,
+			rndis_grp_sub_compatible_id_show,
+			rndis_grp_sub_compatible_id_store);
+
+static struct configfs_attribute *interf_grp_attrs[] = {
+	&rndis_grp_attr_compatible_id.attr,
+	&rndis_grp_attr_sub_compatible_id.attr,
+	NULL
+};
+
+int usb_os_desc_prepare_interf_dir(struct config_group *parent,
+				   int n_interf,
+				   struct usb_os_desc **desc,
+				   struct module *owner)
+{
+	struct config_group **f_default_groups, *os_desc_group,
+				**interface_groups;
+	struct config_item_type *os_desc_type, *interface_type;
+
+	vla_group(data_chunk);
+	vla_item(data_chunk, struct config_group *, f_default_groups, 2);
+	vla_item(data_chunk, struct config_group, os_desc_group, 1);
+	vla_item(data_chunk, struct config_group *, interface_groups,
+		 n_interf + 1);
+	vla_item(data_chunk, struct config_item_type, os_desc_type, 1);
+	vla_item(data_chunk, struct config_item_type, interface_type, 1);
+
+	char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL);
+	if (!vlabuf)
+		return -ENOMEM;
+
+	f_default_groups = vla_ptr(vlabuf, data_chunk, f_default_groups);
+	os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group);
+	os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type);
+	interface_groups = vla_ptr(vlabuf, data_chunk, interface_groups);
+	interface_type = vla_ptr(vlabuf, data_chunk, interface_type);
+
+	parent->default_groups = f_default_groups;
+	os_desc_type->ct_owner = owner;
+	config_group_init_type_name(os_desc_group, "os_desc", os_desc_type);
+	f_default_groups[0] = os_desc_group;
+
+	os_desc_group->default_groups = interface_groups;
+	interface_type->ct_item_ops = &interf_item_ops;
+	interface_type->ct_group_ops = &interf_grp_ops;
+	interface_type->ct_attrs = interf_grp_attrs;
+	interface_type->ct_owner = owner;
+
+	while (n_interf--) {
+		struct usb_os_desc *d;
+
+		d = desc[n_interf];
+		d->owner = owner;
+		config_group_init_type_name(&d->group, "", interface_type);
+		config_item_set_name(&d->group.cg_item, "interface.%d",
+				     n_interf);
+		interface_groups[n_interf] = &d->group;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir);
+
 static int configfs_do_nothing(struct usb_composite_dev *cdev)
 {
 	WARN_ON(1);
@@ -745,6 +1275,9 @@ static int configfs_do_nothing(struct usb_composite_dev *cdev)
 int composite_dev_prepare(struct usb_composite_driver *composite,
 		struct usb_composite_dev *dev);
 
+int composite_os_desc_req_prepare(struct usb_composite_dev *cdev,
+				  struct usb_ep *ep0);
+
 static void purge_configs_funcs(struct gadget_info *gi)
 {
 	struct usb_configuration	*c;
@@ -793,7 +1326,7 @@ static int configfs_composite_bind(struct usb_gadget *gadget,
 	ret = -EINVAL;
 
 	if (list_empty(&gi->cdev.configs)) {
-		pr_err("Need atleast one configuration in %s.\n",
+		pr_err("Need at least one configuration in %s.\n",
 				gi->composite.name);
 		goto err_comp_cleanup;
 	}
@@ -804,7 +1337,7 @@ static int configfs_composite_bind(struct usb_gadget *gadget,
 
 		cfg = container_of(c, struct config_usb_cfg, c);
 		if (list_empty(&cfg->func_list)) {
-			pr_err("Config %s/%d of %s needs atleast one function.\n",
+			pr_err("Config %s/%d of %s needs at least one function.\n",
 			      c->label, c->bConfigurationValue,
 			      gi->composite.name);
 			goto err_comp_cleanup;
@@ -839,6 +1372,12 @@ static int configfs_composite_bind(struct usb_gadget *gadget,
 		gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id;
 	}
 
+	if (gi->use_os_desc) {
+		cdev->use_os_string = true;
+		cdev->b_vendor_code = gi->b_vendor_code;
+		memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN);
+	}
+
 	/* Go through all configs, attach all functions */
 	list_for_each_entry(c, &gi->cdev.configs, list) {
 		struct config_usb_cfg *cfg;
@@ -874,6 +1413,12 @@ static int configfs_composite_bind(struct usb_gadget *gadget,
 		}
 		usb_ep_autoconfig_reset(cdev->gadget);
 	}
+	if (cdev->use_os_string) {
+		ret = composite_os_desc_req_prepare(cdev, gadget->ep0);
+		if (ret)
+			goto err_purge_funcs;
+	}
+
 	usb_ep_autoconfig_reset(cdev->gadget);
 	return 0;
 
@@ -929,6 +1474,7 @@ static struct config_group *gadgets_make(
 	gi->group.default_groups[0] = &gi->functions_group;
 	gi->group.default_groups[1] = &gi->configs_group;
 	gi->group.default_groups[2] = &gi->strings_group;
+	gi->group.default_groups[3] = &gi->os_desc_group;
 
 	config_group_init_type_name(&gi->functions_group, "functions",
 			&functions_type);
@@ -936,6 +1482,8 @@ static struct config_group *gadgets_make(
 			&config_desc_type);
 	config_group_init_type_name(&gi->strings_group, "strings",
 			&gadget_strings_strings_type);
+	config_group_init_type_name(&gi->os_desc_group, "os_desc",
+			&os_desc_type);
 
 	gi->composite.bind = configfs_do_nothing;
 	gi->composite.unbind = configfs_do_nothing;
@@ -1005,7 +1553,7 @@ void unregister_gadget_item(struct config_item *item)
 
 	unregister_gadget(gi);
 }
-EXPORT_SYMBOL(unregister_gadget_item);
+EXPORT_SYMBOL_GPL(unregister_gadget_item);
 
 static int __init gadget_cfs_init(void)
 {
diff --git a/drivers/usb/gadget/configfs.h b/drivers/usb/gadget/configfs.h
index a7b564a913d1..a14ac792c698 100644
--- a/drivers/usb/gadget/configfs.h
+++ b/drivers/usb/gadget/configfs.h
@@ -1,6 +1,18 @@
 #ifndef USB__GADGET__CONFIGFS__H
 #define USB__GADGET__CONFIGFS__H
 
+#include <linux/configfs.h>
+
 void unregister_gadget_item(struct config_item *item);
 
+int usb_os_desc_prepare_interf_dir(struct config_group *parent,
+				   int n_interf,
+				   struct usb_os_desc **desc,
+				   struct module *owner);
+
+static inline struct usb_os_desc *to_usb_os_desc(struct config_item *item)
+{
+	return container_of(to_config_group(item), struct usb_os_desc, group);
+}
+
 #endif /*  USB__GADGET__CONFIGFS__H */
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index 1e12b3ee56fd..74202d67f911 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -33,36 +33,11 @@
 #include <linux/poll.h>
 
 #include "u_fs.h"
+#include "u_f.h"
 #include "configfs.h"
 
 #define FUNCTIONFS_MAGIC	0xa647361 /* Chosen by a honest dice roll ;) */
 
-/* Variable Length Array Macros **********************************************/
-#define vla_group(groupname) size_t groupname##__next = 0
-#define vla_group_size(groupname) groupname##__next
-
-#define vla_item(groupname, type, name, n) \
-	size_t groupname##_##name##__offset = ({			       \
-		size_t align_mask = __alignof__(type) - 1;		       \
-		size_t offset = (groupname##__next + align_mask) & ~align_mask;\
-		size_t size = (n) * sizeof(type);			       \
-		groupname##__next = offset + size;			       \
-		offset;							       \
-	})
-
-#define vla_item_with_sz(groupname, type, name, n) \
-	size_t groupname##_##name##__sz = (n) * sizeof(type);		       \
-	size_t groupname##_##name##__offset = ({			       \
-		size_t align_mask = __alignof__(type) - 1;		       \
-		size_t offset = (groupname##__next + align_mask) & ~align_mask;\
-		size_t size = groupname##_##name##__sz;			       \
-		groupname##__next = offset + size;			       \
-		offset;							       \
-	})
-
-#define vla_ptr(ptr, groupname, name) \
-	((void *) ((char *)ptr + groupname##_##name##__offset))
-
 /* Reference counter handling */
 static void ffs_data_get(struct ffs_data *ffs);
 static void ffs_data_put(struct ffs_data *ffs);
@@ -190,7 +165,7 @@ ffs_sb_create_file(struct super_block *sb, const char *name, void *data,
 /* Devices management *******************************************************/
 
 DEFINE_MUTEX(ffs_lock);
-EXPORT_SYMBOL(ffs_lock);
+EXPORT_SYMBOL_GPL(ffs_lock);
 
 static struct ffs_dev *_ffs_find_dev(const char *name);
 static struct ffs_dev *_ffs_alloc_dev(void);
@@ -2883,7 +2858,7 @@ int ffs_name_dev(struct ffs_dev *dev, const char *name)
 
 	return ret;
 }
-EXPORT_SYMBOL(ffs_name_dev);
+EXPORT_SYMBOL_GPL(ffs_name_dev);
 
 int ffs_single_dev(struct ffs_dev *dev)
 {
@@ -2900,7 +2875,7 @@ int ffs_single_dev(struct ffs_dev *dev)
 	ffs_dev_unlock();
 	return ret;
 }
-EXPORT_SYMBOL(ffs_single_dev);
+EXPORT_SYMBOL_GPL(ffs_single_dev);
 
 /*
  * ffs_lock must be taken by the caller of this function
diff --git a/drivers/usb/gadget/f_rndis.c b/drivers/usb/gadget/f_rndis.c
index 9a4f49dc6ac4..eed3ad878047 100644
--- a/drivers/usb/gadget/f_rndis.c
+++ b/drivers/usb/gadget/f_rndis.c
@@ -27,6 +27,7 @@
 #include "u_ether_configfs.h"
 #include "u_rndis.h"
 #include "rndis.h"
+#include "configfs.h"
 
 /*
  * This function is an RNDIS Ethernet port -- a Microsoft protocol that's
@@ -682,6 +683,15 @@ rndis_bind(struct usb_configuration *c, struct usb_function *f)
 
 	rndis_opts = container_of(f->fi, struct f_rndis_opts, func_inst);
 
+	if (cdev->use_os_string) {
+		f->os_desc_table = kzalloc(sizeof(*f->os_desc_table),
+					   GFP_KERNEL);
+		if (!f->os_desc_table)
+			return PTR_ERR(f->os_desc_table);
+		f->os_desc_n = 1;
+		f->os_desc_table[0].os_desc = &rndis_opts->rndis_os_desc;
+	}
+
 	/*
 	 * in drivers/usb/gadget/configfs.c:configfs_composite_bind()
 	 * configurations are bound in sequence with list_for_each_entry,
@@ -693,14 +703,16 @@ rndis_bind(struct usb_configuration *c, struct usb_function *f)
 		gether_set_gadget(rndis_opts->net, cdev->gadget);
 		status = gether_register_netdev(rndis_opts->net);
 		if (status)
-			return status;
+			goto fail;
 		rndis_opts->bound = true;
 	}
 
 	us = usb_gstrings_attach(cdev, rndis_strings,
 				 ARRAY_SIZE(rndis_string_defs));
-	if (IS_ERR(us))
-		return PTR_ERR(us);
+	if (IS_ERR(us)) {
+		status = PTR_ERR(us);
+		goto fail;
+	}
 	rndis_control_intf.iInterface = us[0].id;
 	rndis_data_intf.iInterface = us[1].id;
 	rndis_iad_descriptor.iFunction = us[2].id;
@@ -802,6 +814,8 @@ rndis_bind(struct usb_configuration *c, struct usb_function *f)
 	return 0;
 
 fail:
+	kfree(f->os_desc_table);
+	f->os_desc_n = 0;
 	usb_free_all_descriptors(f);
 
 	if (rndis->notify_req) {
@@ -834,7 +848,7 @@ void rndis_borrow_net(struct usb_function_instance *f, struct net_device *net)
 	opts->borrowed_net = opts->bound = true;
 	opts->net = net;
 }
-EXPORT_SYMBOL(rndis_borrow_net);
+EXPORT_SYMBOL_GPL(rndis_borrow_net);
 
 static inline struct f_rndis_opts *to_f_rndis_opts(struct config_item *item)
 {
@@ -882,16 +896,21 @@ static void rndis_free_inst(struct usb_function_instance *f)
 		else
 			free_netdev(opts->net);
 	}
+
+	kfree(opts->rndis_os_desc.group.default_groups); /* single VLA chunk */
 	kfree(opts);
 }
 
 static struct usb_function_instance *rndis_alloc_inst(void)
 {
 	struct f_rndis_opts *opts;
+	struct usb_os_desc *descs[1];
 
 	opts = kzalloc(sizeof(*opts), GFP_KERNEL);
 	if (!opts)
 		return ERR_PTR(-ENOMEM);
+	opts->rndis_os_desc.ext_compat_id = opts->rndis_ext_compat_id;
+
 	mutex_init(&opts->lock);
 	opts->func_inst.free_func_inst = rndis_free_inst;
 	opts->net = gether_setup_default();
@@ -900,7 +919,11 @@ static struct usb_function_instance *rndis_alloc_inst(void)
 		kfree(opts);
 		return ERR_CAST(net);
 	}
+	INIT_LIST_HEAD(&opts->rndis_os_desc.ext_prop);
 
+	descs[0] = &opts->rndis_os_desc;
+	usb_os_desc_prepare_interf_dir(&opts->func_inst.group, 1, descs,
+				       THIS_MODULE);
 	config_group_init_type_name(&opts->func_inst.group, "",
 				    &rndis_func_type);
 
@@ -925,6 +948,8 @@ static void rndis_unbind(struct usb_configuration *c, struct usb_function *f)
 {
 	struct f_rndis		*rndis = func_to_rndis(f);
 
+	kfree(f->os_desc_table);
+	f->os_desc_n = 0;
 	usb_free_all_descriptors(f);
 
 	kfree(rndis->notify_req->buf);
diff --git a/drivers/usb/gadget/f_subset.c b/drivers/usb/gadget/f_subset.c
index df4a0dcbc993..1ea8baf33333 100644
--- a/drivers/usb/gadget/f_subset.c
+++ b/drivers/usb/gadget/f_subset.c
@@ -276,7 +276,7 @@ static int geth_set_alt(struct usb_function *f, unsigned intf, unsigned alt)
 	}
 
 	net = gether_connect(&geth->port);
-	return PTR_RET(net);
+	return PTR_ERR_OR_ZERO(net);
 }
 
 static void geth_disable(struct usb_function *f)
diff --git a/drivers/usb/gadget/f_uac2.c b/drivers/usb/gadget/f_uac2.c
index bc23040c7790..6261db4a9910 100644
--- a/drivers/usb/gadget/f_uac2.c
+++ b/drivers/usb/gadget/f_uac2.c
@@ -196,7 +196,7 @@ agdev_iso_complete(struct usb_ep *ep, struct usb_request *req)
 	struct snd_uac2_chip *uac2 = prm->uac2;
 
 	/* i/f shutting down */
-	if (!prm->ep_enabled)
+	if (!prm->ep_enabled || req->status == -ESHUTDOWN)
 		return;
 
 	/*
@@ -974,8 +974,6 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 	prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
 	if (!prm->rbuf) {
 		prm->max_psize = 0;
-		dev_err(&uac2->pdev.dev,
-			"%s:%d Error!\n", __func__, __LINE__);
 		goto err;
 	}
 
@@ -984,8 +982,6 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
 	prm->rbuf = kzalloc(prm->max_psize * USB_XFERS, GFP_KERNEL);
 	if (!prm->rbuf) {
 		prm->max_psize = 0;
-		dev_err(&uac2->pdev.dev,
-			"%s:%d Error!\n", __func__, __LINE__);
 		goto err;
 	}
 
@@ -1298,10 +1294,8 @@ static int audio_bind_config(struct usb_configuration *cfg)
 	int res;
 
 	agdev_g = kzalloc(sizeof *agdev_g, GFP_KERNEL);
-	if (agdev_g == NULL) {
-		printk(KERN_ERR "Unable to allocate audio gadget\n");
+	if (agdev_g == NULL)
 		return -ENOMEM;
-	}
 
 	res = usb_string_ids_tab(cfg->cdev, strings_fn);
 	if (res)
diff --git a/drivers/usb/gadget/fotg210-udc.c b/drivers/usb/gadget/fotg210-udc.c
index 2d0305280e8c..e143d69f6017 100644
--- a/drivers/usb/gadget/fotg210-udc.c
+++ b/drivers/usb/gadget/fotg210-udc.c
@@ -1112,17 +1112,13 @@ static int fotg210_udc_probe(struct platform_device *pdev)
 
 	/* initialize udc */
 	fotg210 = kzalloc(sizeof(struct fotg210_udc), GFP_KERNEL);
-	if (fotg210 == NULL) {
-		pr_err("kzalloc error\n");
+	if (fotg210 == NULL)
 		goto err_alloc;
-	}
 
 	for (i = 0; i < FOTG210_MAX_NUM_EP; i++) {
 		_ep[i] = kzalloc(sizeof(struct fotg210_ep), GFP_KERNEL);
-		if (_ep[i] == NULL) {
-			pr_err("_ep kzalloc error\n");
+		if (_ep[i] == NULL)
 			goto err_alloc;
-		}
 		fotg210->ep[i] = _ep[i];
 	}
 
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
index a2f26cdb56fe..28e4fc957026 100644
--- a/drivers/usb/gadget/fsl_udc_core.c
+++ b/drivers/usb/gadget/fsl_udc_core.c
@@ -2256,10 +2256,8 @@ static int __init struct_udc_setup(struct fsl_udc *udc,
 	udc->phy_mode = pdata->phy_mode;
 
 	udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
-	if (!udc->eps) {
-		ERR("malloc fsl_ep failed\n");
+	if (!udc->eps)
 		return -1;
-	}
 
 	/* initialized QHs, take care of alignment */
 	size = udc->max_ep * sizeof(struct ep_queue_head);
@@ -2342,10 +2340,8 @@ static int __init fsl_udc_probe(struct platform_device *pdev)
 	u32 dccparams;
 
 	udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
-	if (udc_controller == NULL) {
-		ERR("malloc udc failed\n");
+	if (udc_controller == NULL)
 		return -ENOMEM;
-	}
 
 	pdata = dev_get_platdata(&pdev->dev);
 	udc_controller->pdata = pdata;
diff --git a/drivers/usb/gadget/fusb300_udc.c b/drivers/usb/gadget/fusb300_udc.c
index 6423f1840ed9..3deb4e938071 100644
--- a/drivers/usb/gadget/fusb300_udc.c
+++ b/drivers/usb/gadget/fusb300_udc.c
@@ -1400,17 +1400,13 @@ static int __init fusb300_probe(struct platform_device *pdev)
 
 	/* initialize udc */
 	fusb300 = kzalloc(sizeof(struct fusb300), GFP_KERNEL);
-	if (fusb300 == NULL) {
-		pr_err("kzalloc error\n");
+	if (fusb300 == NULL)
 		goto clean_up;
-	}
 
 	for (i = 0; i < FUSB300_MAX_NUM_EP; i++) {
 		_ep[i] = kzalloc(sizeof(struct fusb300_ep), GFP_KERNEL);
-		if (_ep[i] == NULL) {
-			pr_err("_ep kzalloc error\n");
+		if (_ep[i] == NULL)
 			goto clean_up;
-		}
 		fusb300->ep[i] = _ep[i];
 	}
 
diff --git a/drivers/usb/gadget/gr_udc.c b/drivers/usb/gadget/gr_udc.c
index f984ee75324d..99a37ed03e27 100644
--- a/drivers/usb/gadget/gr_udc.c
+++ b/drivers/usb/gadget/gr_udc.c
@@ -143,6 +143,7 @@ static void gr_seq_ep_show(struct seq_file *seq, struct gr_ep *ep)
 	seq_printf(seq, "  wedged = %d\n", ep->wedged);
 	seq_printf(seq, "  callback = %d\n", ep->callback);
 	seq_printf(seq, "  maxpacket = %d\n", ep->ep.maxpacket);
+	seq_printf(seq, "  maxpacket_limit = %d\n", ep->ep.maxpacket_limit);
 	seq_printf(seq, "  bytes_per_buffer = %d\n", ep->bytes_per_buffer);
 	if (mode == 1 || mode == 3)
 		seq_printf(seq, "  nt = %d\n",
@@ -1541,6 +1542,10 @@ static int gr_ep_enable(struct usb_ep *_ep,
 	} else if (max == 0) {
 		dev_err(dev->dev, "Max payload cannot be set to 0\n");
 		return -EINVAL;
+	} else if (max > ep->ep.maxpacket_limit) {
+		dev_err(dev->dev, "Requested max payload %d > limit %d\n",
+			max, ep->ep.maxpacket_limit);
+		return -EINVAL;
 	}
 
 	spin_lock(&ep->dev->lock);
@@ -1679,7 +1684,7 @@ static int gr_queue_ext(struct usb_ep *_ep, struct usb_request *_req,
 	if (ep->is_in)
 		gr_dbgprint_request("EXTERN", ep, req);
 
-	ret = gr_queue(ep, req, gfp_flags);
+	ret = gr_queue(ep, req, GFP_ATOMIC);
 
 	spin_unlock(&ep->dev->lock);
 
@@ -1985,8 +1990,8 @@ static int gr_ep_init(struct gr_udc *dev, int num, int is_in, u32 maxplimit)
 	INIT_LIST_HEAD(&ep->queue);
 
 	if (num == 0) {
-		_req = gr_alloc_request(&ep->ep, GFP_KERNEL);
-		buf = devm_kzalloc(dev->dev, PAGE_SIZE, GFP_DMA | GFP_KERNEL);
+		_req = gr_alloc_request(&ep->ep, GFP_ATOMIC);
+		buf = devm_kzalloc(dev->dev, PAGE_SIZE, GFP_DMA | GFP_ATOMIC);
 		if (!_req || !buf) {
 			/* possible _req freed by gr_probe via gr_remove */
 			return -ENOMEM;
@@ -2020,9 +2025,7 @@ static int gr_udc_init(struct gr_udc *dev)
 	u32 dmactrl_val;
 	int i;
 	int ret = 0;
-	u32 *bufsizes;
 	u32 bufsize;
-	int len;
 
 	gr_set_address(dev, 0);
 
@@ -2033,19 +2036,17 @@ static int gr_udc_init(struct gr_udc *dev)
 	INIT_LIST_HEAD(&dev->ep_list);
 	gr_set_ep0state(dev, GR_EP0_DISCONNECT);
 
-	bufsizes = (u32 *)of_get_property(np, "epobufsizes", &len);
-	len /= sizeof(u32);
 	for (i = 0; i < dev->nepo; i++) {
-		bufsize = (bufsizes && i < len) ? bufsizes[i] : 1024;
+		if (of_property_read_u32_index(np, "epobufsizes", i, &bufsize))
+			bufsize = 1024;
 		ret = gr_ep_init(dev, i, 0, bufsize);
 		if (ret)
 			return ret;
 	}
 
-	bufsizes = (u32 *)of_get_property(np, "epibufsizes", &len);
-	len /= sizeof(u32);
 	for (i = 0; i < dev->nepi; i++) {
-		bufsize = (bufsizes && i < len) ? bufsizes[i] : 1024;
+		if (of_property_read_u32_index(np, "epibufsizes", i, &bufsize))
+			bufsize = 1024;
 		ret = gr_ep_init(dev, i, 1, bufsize);
 		if (ret)
 			return ret;
@@ -2065,9 +2066,9 @@ static int gr_udc_init(struct gr_udc *dev)
 	return 0;
 }
 
-static int gr_remove(struct platform_device *ofdev)
+static int gr_remove(struct platform_device *pdev)
 {
-	struct gr_udc *dev = dev_get_drvdata(&ofdev->dev);
+	struct gr_udc *dev = platform_get_drvdata(pdev);
 
 	if (dev->added)
 		usb_del_gadget_udc(&dev->gadget); /* Shuts everything down */
@@ -2077,7 +2078,7 @@ static int gr_remove(struct platform_device *ofdev)
 	gr_dfs_delete(dev);
 	if (dev->desc_pool)
 		dma_pool_destroy(dev->desc_pool);
-	dev_set_drvdata(&ofdev->dev, NULL);
+	platform_set_drvdata(pdev, NULL);
 
 	gr_free_request(&dev->epi[0].ep, &dev->ep0reqi->req);
 	gr_free_request(&dev->epo[0].ep, &dev->ep0reqo->req);
@@ -2090,7 +2091,7 @@ static int gr_request_irq(struct gr_udc *dev, int irq)
 					 IRQF_SHARED, driver_name, dev);
 }
 
-static int gr_probe(struct platform_device *ofdev)
+static int gr_probe(struct platform_device *pdev)
 {
 	struct gr_udc *dev;
 	struct resource *res;
@@ -2098,30 +2099,32 @@ static int gr_probe(struct platform_device *ofdev)
 	int retval;
 	u32 status;
 
-	dev = devm_kzalloc(&ofdev->dev, sizeof(*dev), GFP_KERNEL);
+	dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 	if (!dev)
 		return -ENOMEM;
-	dev->dev = &ofdev->dev;
+	dev->dev = &pdev->dev;
 
-	res = platform_get_resource(ofdev, IORESOURCE_MEM, 0);
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	regs = devm_ioremap_resource(dev->dev, res);
 	if (IS_ERR(regs))
 		return PTR_ERR(regs);
 
-	dev->irq = irq_of_parse_and_map(dev->dev->of_node, 0);
-	if (!dev->irq) {
+	dev->irq = platform_get_irq(pdev, 0);
+	if (dev->irq <= 0) {
 		dev_err(dev->dev, "No irq found\n");
 		return -ENODEV;
 	}
 
 	/* Some core configurations has separate irqs for IN and OUT events */
-	dev->irqi = irq_of_parse_and_map(dev->dev->of_node, 1);
-	if (dev->irqi) {
-		dev->irqo = irq_of_parse_and_map(dev->dev->of_node, 2);
-		if (!dev->irqo) {
+	dev->irqi = platform_get_irq(pdev, 1);
+	if (dev->irqi > 0) {
+		dev->irqo = platform_get_irq(pdev, 2);
+		if (dev->irqo <= 0) {
 			dev_err(dev->dev, "Found irqi but not irqo\n");
 			return -ENODEV;
 		}
+	} else {
+		dev->irqi = 0;
 	}
 
 	dev->gadget.name = driver_name;
@@ -2132,7 +2135,7 @@ static int gr_probe(struct platform_device *ofdev)
 	spin_lock_init(&dev->lock);
 	dev->regs = regs;
 
-	dev_set_drvdata(&ofdev->dev, dev);
+	platform_set_drvdata(pdev, dev);
 
 	/* Determine number of endpoints and data interface mode */
 	status = gr_read32(&dev->regs->status);
@@ -2204,7 +2207,7 @@ out:
 	spin_unlock(&dev->lock);
 
 	if (retval)
-		gr_remove(ofdev);
+		gr_remove(pdev);
 
 	return retval;
 }
diff --git a/drivers/usb/gadget/inode.c b/drivers/usb/gadget/inode.c
index a925d0cbcd41..5b840fb0cce5 100644
--- a/drivers/usb/gadget/inode.c
+++ b/drivers/usb/gadget/inode.c
@@ -1494,6 +1494,7 @@ gadgetfs_setup (struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl)
 		 */
 		if (value == 0) {
 			INFO (dev, "configuration #%d\n", dev->current_config);
+			usb_gadget_set_state(gadget, USB_STATE_CONFIGURED);
 			if (dev->usermode_setup) {
 				dev->setup_can_stall = 0;
 				goto delegate;
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
index 8cae01d88597..0d17174b86f8 100644
--- a/drivers/usb/gadget/m66592-udc.c
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -1594,7 +1594,6 @@ static int __init m66592_probe(struct platform_device *pdev)
 	m66592 = kzalloc(sizeof(struct m66592), GFP_KERNEL);
 	if (m66592 == NULL) {
 		ret = -ENOMEM;
-		pr_err("kzalloc error\n");
 		goto clean_up;
 	}
 
diff --git a/drivers/usb/gadget/mv_u3d_core.c b/drivers/usb/gadget/mv_u3d_core.c
index d2ca59e7b477..16248711c152 100644
--- a/drivers/usb/gadget/mv_u3d_core.c
+++ b/drivers/usb/gadget/mv_u3d_core.c
@@ -297,10 +297,8 @@ static struct mv_u3d_trb *mv_u3d_build_trb_one(struct mv_u3d_req *req,
 	u3d = req->ep->u3d;
 
 	trb = kzalloc(sizeof(*trb), GFP_ATOMIC);
-	if (!trb) {
-		dev_err(u3d->dev, "%s, trb alloc fail\n", __func__);
+	if (!trb)
 		return NULL;
-	}
 
 	/*
 	 * Be careful that no _GFP_HIGHMEM is set,
@@ -446,17 +444,12 @@ static int mv_u3d_req_to_trb(struct mv_u3d_req *req)
 			trb_num++;
 
 		trb = kcalloc(trb_num, sizeof(*trb), GFP_ATOMIC);
-		if (!trb) {
-			dev_err(u3d->dev,
-					"%s, trb alloc fail\n", __func__);
+		if (!trb)
 			return -ENOMEM;
-		}
 
 		trb_hw = kcalloc(trb_num, sizeof(*trb_hw), GFP_ATOMIC);
 		if (!trb_hw) {
 			kfree(trb);
-			dev_err(u3d->dev,
-					"%s, trb_hw alloc fail\n", __func__);
 			return -ENOMEM;
 		}
 
@@ -1811,7 +1804,6 @@ static int mv_u3d_probe(struct platform_device *dev)
 
 	u3d = kzalloc(sizeof(*u3d), GFP_KERNEL);
 	if (!u3d) {
-		dev_err(&dev->dev, "failed to allocate memory for u3d\n");
 		retval = -ENOMEM;
 		goto err_alloc_private;
 	}
@@ -1905,7 +1897,6 @@ static int mv_u3d_probe(struct platform_device *dev)
 	size = u3d->max_eps * sizeof(struct mv_u3d_ep) * 2;
 	u3d->eps = kzalloc(size, GFP_KERNEL);
 	if (!u3d->eps) {
-		dev_err(&dev->dev, "allocate ep memory failed\n");
 		retval = -ENOMEM;
 		goto err_alloc_eps;
 	}
@@ -1913,7 +1904,6 @@ static int mv_u3d_probe(struct platform_device *dev)
 	/* initialize ep0 status request structure */
 	u3d->status_req = kzalloc(sizeof(struct mv_u3d_req) + 8, GFP_KERNEL);
 	if (!u3d->status_req) {
-		dev_err(&dev->dev, "allocate status_req memory failed\n");
 		retval = -ENOMEM;
 		goto err_alloc_status_req;
 	}
diff --git a/drivers/usb/gadget/net2280.c b/drivers/usb/gadget/net2280.c
index 43e5e2f9888f..300b3a71383b 100644
--- a/drivers/usb/gadget/net2280.c
+++ b/drivers/usb/gadget/net2280.c
@@ -1972,7 +1972,9 @@ static int net2280_stop(struct usb_gadget *_gadget,
 	device_remove_file (&dev->pdev->dev, &dev_attr_function);
 	device_remove_file (&dev->pdev->dev, &dev_attr_queues);
 
-	DEBUG (dev, "unregistered driver '%s'\n", driver->driver.name);
+	DEBUG(dev, "unregistered driver '%s'\n",
+			driver ? driver->driver.name : "");
+
 	return 0;
 }
 
diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
index aff0a6718bc6..b698a490cc7d 100644
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -1904,7 +1904,6 @@ static int __init r8a66597_probe(struct platform_device *pdev)
 	r8a66597 = kzalloc(sizeof(struct r8a66597), GFP_KERNEL);
 	if (r8a66597 == NULL) {
 		ret = -ENOMEM;
-		dev_err(&pdev->dev, "kzalloc error\n");
 		goto clean_up;
 	}
 
diff --git a/drivers/usb/gadget/rndis.c b/drivers/usb/gadget/rndis.c
index 7ed452d90f4d..95d2324f6977 100644
--- a/drivers/usb/gadget/rndis.c
+++ b/drivers/usb/gadget/rndis.c
@@ -761,7 +761,7 @@ int rndis_signal_connect(int configNr)
 	return rndis_indicate_status_msg(configNr,
 					  RNDIS_STATUS_MEDIA_CONNECT);
 }
-EXPORT_SYMBOL(rndis_signal_connect);
+EXPORT_SYMBOL_GPL(rndis_signal_connect);
 
 int rndis_signal_disconnect(int configNr)
 {
@@ -770,7 +770,7 @@ int rndis_signal_disconnect(int configNr)
 	return rndis_indicate_status_msg(configNr,
 					  RNDIS_STATUS_MEDIA_DISCONNECT);
 }
-EXPORT_SYMBOL(rndis_signal_disconnect);
+EXPORT_SYMBOL_GPL(rndis_signal_disconnect);
 
 void rndis_uninit(int configNr)
 {
@@ -785,13 +785,13 @@ void rndis_uninit(int configNr)
 	while ((buf = rndis_get_next_response(configNr, &length)))
 		rndis_free_response(configNr, buf);
 }
-EXPORT_SYMBOL(rndis_uninit);
+EXPORT_SYMBOL_GPL(rndis_uninit);
 
 void rndis_set_host_mac(int configNr, const u8 *addr)
 {
 	rndis_per_dev_params[configNr].host_mac = addr;
 }
-EXPORT_SYMBOL(rndis_set_host_mac);
+EXPORT_SYMBOL_GPL(rndis_set_host_mac);
 
 /*
  * Message Parser
@@ -874,7 +874,7 @@ int rndis_msg_parser(u8 configNr, u8 *buf)
 
 	return -ENOTSUPP;
 }
-EXPORT_SYMBOL(rndis_msg_parser);
+EXPORT_SYMBOL_GPL(rndis_msg_parser);
 
 int rndis_register(void (*resp_avail)(void *v), void *v)
 {
@@ -896,7 +896,7 @@ int rndis_register(void (*resp_avail)(void *v), void *v)
 
 	return -ENODEV;
 }
-EXPORT_SYMBOL(rndis_register);
+EXPORT_SYMBOL_GPL(rndis_register);
 
 void rndis_deregister(int configNr)
 {
@@ -905,7 +905,7 @@ void rndis_deregister(int configNr)
 	if (configNr >= RNDIS_MAX_CONFIGS) return;
 	rndis_per_dev_params[configNr].used = 0;
 }
-EXPORT_SYMBOL(rndis_deregister);
+EXPORT_SYMBOL_GPL(rndis_deregister);
 
 int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
 {
@@ -919,7 +919,7 @@ int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
 
 	return 0;
 }
-EXPORT_SYMBOL(rndis_set_param_dev);
+EXPORT_SYMBOL_GPL(rndis_set_param_dev);
 
 int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr)
 {
@@ -932,7 +932,7 @@ int rndis_set_param_vendor(u8 configNr, u32 vendorID, const char *vendorDescr)
 
 	return 0;
 }
-EXPORT_SYMBOL(rndis_set_param_vendor);
+EXPORT_SYMBOL_GPL(rndis_set_param_vendor);
 
 int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed)
 {
@@ -944,7 +944,7 @@ int rndis_set_param_medium(u8 configNr, u32 medium, u32 speed)
 
 	return 0;
 }
-EXPORT_SYMBOL(rndis_set_param_medium);
+EXPORT_SYMBOL_GPL(rndis_set_param_medium);
 
 void rndis_add_hdr(struct sk_buff *skb)
 {
@@ -959,7 +959,7 @@ void rndis_add_hdr(struct sk_buff *skb)
 	header->DataOffset = cpu_to_le32(36);
 	header->DataLength = cpu_to_le32(skb->len - sizeof(*header));
 }
-EXPORT_SYMBOL(rndis_add_hdr);
+EXPORT_SYMBOL_GPL(rndis_add_hdr);
 
 void rndis_free_response(int configNr, u8 *buf)
 {
@@ -976,7 +976,7 @@ void rndis_free_response(int configNr, u8 *buf)
 		}
 	}
 }
-EXPORT_SYMBOL(rndis_free_response);
+EXPORT_SYMBOL_GPL(rndis_free_response);
 
 u8 *rndis_get_next_response(int configNr, u32 *length)
 {
@@ -998,7 +998,7 @@ u8 *rndis_get_next_response(int configNr, u32 *length)
 
 	return NULL;
 }
-EXPORT_SYMBOL(rndis_get_next_response);
+EXPORT_SYMBOL_GPL(rndis_get_next_response);
 
 static rndis_resp_t *rndis_add_response(int configNr, u32 length)
 {
@@ -1042,7 +1042,7 @@ int rndis_rm_hdr(struct gether *port,
 	skb_queue_tail(list, skb);
 	return 0;
 }
-EXPORT_SYMBOL(rndis_rm_hdr);
+EXPORT_SYMBOL_GPL(rndis_rm_hdr);
 
 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
 
diff --git a/drivers/usb/gadget/s3c2410_udc.c b/drivers/usb/gadget/s3c2410_udc.c
index dd9678f85c58..7987aa049fab 100644
--- a/drivers/usb/gadget/s3c2410_udc.c
+++ b/drivers/usb/gadget/s3c2410_udc.c
@@ -117,7 +117,8 @@ static int dprintk(int level, const char *fmt, ...)
 			sizeof(printk_buf)-len, fmt, args);
 	va_end(args);
 
-	return pr_debug("%s", printk_buf);
+	pr_debug("%s", printk_buf);
+	return len;
 }
 #else
 static int dprintk(int level, const char *fmt, ...)
diff --git a/drivers/usb/gadget/storage_common.c b/drivers/usb/gadget/storage_common.c
index ec20a1f50c2d..ff205a7bc55c 100644
--- a/drivers/usb/gadget/storage_common.c
+++ b/drivers/usb/gadget/storage_common.c
@@ -43,7 +43,7 @@ struct usb_interface_descriptor fsg_intf_desc = {
 	.bInterfaceProtocol =	USB_PR_BULK,	/* Adjusted during fsg_bind() */
 	.iInterface =		FSG_STRING_INTERFACE,
 };
-EXPORT_SYMBOL(fsg_intf_desc);
+EXPORT_SYMBOL_GPL(fsg_intf_desc);
 
 /*
  * Three full-speed endpoint descriptors: bulk-in, bulk-out, and
@@ -58,7 +58,7 @@ struct usb_endpoint_descriptor fsg_fs_bulk_in_desc = {
 	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
 	/* wMaxPacketSize set by autoconfiguration */
 };
-EXPORT_SYMBOL(fsg_fs_bulk_in_desc);
+EXPORT_SYMBOL_GPL(fsg_fs_bulk_in_desc);
 
 struct usb_endpoint_descriptor fsg_fs_bulk_out_desc = {
 	.bLength =		USB_DT_ENDPOINT_SIZE,
@@ -68,7 +68,7 @@ struct usb_endpoint_descriptor fsg_fs_bulk_out_desc = {
 	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
 	/* wMaxPacketSize set by autoconfiguration */
 };
-EXPORT_SYMBOL(fsg_fs_bulk_out_desc);
+EXPORT_SYMBOL_GPL(fsg_fs_bulk_out_desc);
 
 struct usb_descriptor_header *fsg_fs_function[] = {
 	(struct usb_descriptor_header *) &fsg_intf_desc,
@@ -76,7 +76,7 @@ struct usb_descriptor_header *fsg_fs_function[] = {
 	(struct usb_descriptor_header *) &fsg_fs_bulk_out_desc,
 	NULL,
 };
-EXPORT_SYMBOL(fsg_fs_function);
+EXPORT_SYMBOL_GPL(fsg_fs_function);
 
 
 /*
@@ -95,7 +95,7 @@ struct usb_endpoint_descriptor fsg_hs_bulk_in_desc = {
 	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
 	.wMaxPacketSize =	cpu_to_le16(512),
 };
-EXPORT_SYMBOL(fsg_hs_bulk_in_desc);
+EXPORT_SYMBOL_GPL(fsg_hs_bulk_in_desc);
 
 struct usb_endpoint_descriptor fsg_hs_bulk_out_desc = {
 	.bLength =		USB_DT_ENDPOINT_SIZE,
@@ -106,7 +106,7 @@ struct usb_endpoint_descriptor fsg_hs_bulk_out_desc = {
 	.wMaxPacketSize =	cpu_to_le16(512),
 	.bInterval =		1,	/* NAK every 1 uframe */
 };
-EXPORT_SYMBOL(fsg_hs_bulk_out_desc);
+EXPORT_SYMBOL_GPL(fsg_hs_bulk_out_desc);
 
 
 struct usb_descriptor_header *fsg_hs_function[] = {
@@ -115,7 +115,7 @@ struct usb_descriptor_header *fsg_hs_function[] = {
 	(struct usb_descriptor_header *) &fsg_hs_bulk_out_desc,
 	NULL,
 };
-EXPORT_SYMBOL(fsg_hs_function);
+EXPORT_SYMBOL_GPL(fsg_hs_function);
 
 struct usb_endpoint_descriptor fsg_ss_bulk_in_desc = {
 	.bLength =		USB_DT_ENDPOINT_SIZE,
@@ -125,7 +125,7 @@ struct usb_endpoint_descriptor fsg_ss_bulk_in_desc = {
 	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
 	.wMaxPacketSize =	cpu_to_le16(1024),
 };
-EXPORT_SYMBOL(fsg_ss_bulk_in_desc);
+EXPORT_SYMBOL_GPL(fsg_ss_bulk_in_desc);
 
 struct usb_ss_ep_comp_descriptor fsg_ss_bulk_in_comp_desc = {
 	.bLength =		sizeof(fsg_ss_bulk_in_comp_desc),
@@ -133,7 +133,7 @@ struct usb_ss_ep_comp_descriptor fsg_ss_bulk_in_comp_desc = {
 
 	/*.bMaxBurst =		DYNAMIC, */
 };
-EXPORT_SYMBOL(fsg_ss_bulk_in_comp_desc);
+EXPORT_SYMBOL_GPL(fsg_ss_bulk_in_comp_desc);
 
 struct usb_endpoint_descriptor fsg_ss_bulk_out_desc = {
 	.bLength =		USB_DT_ENDPOINT_SIZE,
@@ -143,7 +143,7 @@ struct usb_endpoint_descriptor fsg_ss_bulk_out_desc = {
 	.bmAttributes =		USB_ENDPOINT_XFER_BULK,
 	.wMaxPacketSize =	cpu_to_le16(1024),
 };
-EXPORT_SYMBOL(fsg_ss_bulk_out_desc);
+EXPORT_SYMBOL_GPL(fsg_ss_bulk_out_desc);
 
 struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc = {
 	.bLength =		sizeof(fsg_ss_bulk_in_comp_desc),
@@ -151,7 +151,7 @@ struct usb_ss_ep_comp_descriptor fsg_ss_bulk_out_comp_desc = {
 
 	/*.bMaxBurst =		DYNAMIC, */
 };
-EXPORT_SYMBOL(fsg_ss_bulk_out_comp_desc);
+EXPORT_SYMBOL_GPL(fsg_ss_bulk_out_comp_desc);
 
 struct usb_descriptor_header *fsg_ss_function[] = {
 	(struct usb_descriptor_header *) &fsg_intf_desc,
@@ -161,7 +161,7 @@ struct usb_descriptor_header *fsg_ss_function[] = {
 	(struct usb_descriptor_header *) &fsg_ss_bulk_out_comp_desc,
 	NULL,
 };
-EXPORT_SYMBOL(fsg_ss_function);
+EXPORT_SYMBOL_GPL(fsg_ss_function);
 
 
  /*-------------------------------------------------------------------------*/
@@ -179,7 +179,7 @@ void fsg_lun_close(struct fsg_lun *curlun)
 		curlun->filp = NULL;
 	}
 }
-EXPORT_SYMBOL(fsg_lun_close);
+EXPORT_SYMBOL_GPL(fsg_lun_close);
 
 int fsg_lun_open(struct fsg_lun *curlun, const char *filename)
 {
@@ -278,7 +278,7 @@ out:
 	fput(filp);
 	return rc;
 }
-EXPORT_SYMBOL(fsg_lun_open);
+EXPORT_SYMBOL_GPL(fsg_lun_open);
 
 
 /*-------------------------------------------------------------------------*/
@@ -295,7 +295,7 @@ int fsg_lun_fsync_sub(struct fsg_lun *curlun)
 		return 0;
 	return vfs_fsync(filp, 1);
 }
-EXPORT_SYMBOL(fsg_lun_fsync_sub);
+EXPORT_SYMBOL_GPL(fsg_lun_fsync_sub);
 
 void store_cdrom_address(u8 *dest, int msf, u32 addr)
 {
@@ -314,7 +314,7 @@ void store_cdrom_address(u8 *dest, int msf, u32 addr)
 		put_unaligned_be32(addr, dest);
 	}
 }
-EXPORT_SYMBOL(store_cdrom_address);
+EXPORT_SYMBOL_GPL(store_cdrom_address);
 
 /*-------------------------------------------------------------------------*/
 
@@ -325,13 +325,13 @@ ssize_t fsg_show_ro(struct fsg_lun *curlun, char *buf)
 				  ? curlun->ro
 				  : curlun->initially_ro);
 }
-EXPORT_SYMBOL(fsg_show_ro);
+EXPORT_SYMBOL_GPL(fsg_show_ro);
 
 ssize_t fsg_show_nofua(struct fsg_lun *curlun, char *buf)
 {
 	return sprintf(buf, "%u\n", curlun->nofua);
 }
-EXPORT_SYMBOL(fsg_show_nofua);
+EXPORT_SYMBOL_GPL(fsg_show_nofua);
 
 ssize_t fsg_show_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
 		      char *buf)
@@ -357,19 +357,19 @@ ssize_t fsg_show_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
 	up_read(filesem);
 	return rc;
 }
-EXPORT_SYMBOL(fsg_show_file);
+EXPORT_SYMBOL_GPL(fsg_show_file);
 
 ssize_t fsg_show_cdrom(struct fsg_lun *curlun, char *buf)
 {
 	return sprintf(buf, "%u\n", curlun->cdrom);
 }
-EXPORT_SYMBOL(fsg_show_cdrom);
+EXPORT_SYMBOL_GPL(fsg_show_cdrom);
 
 ssize_t fsg_show_removable(struct fsg_lun *curlun, char *buf)
 {
 	return sprintf(buf, "%u\n", curlun->removable);
 }
-EXPORT_SYMBOL(fsg_show_removable);
+EXPORT_SYMBOL_GPL(fsg_show_removable);
 
 /*
  * The caller must hold fsg->filesem for reading when calling this function.
@@ -410,7 +410,7 @@ ssize_t fsg_store_ro(struct fsg_lun *curlun, struct rw_semaphore *filesem,
 
 	return rc;
 }
-EXPORT_SYMBOL(fsg_store_ro);
+EXPORT_SYMBOL_GPL(fsg_store_ro);
 
 ssize_t fsg_store_nofua(struct fsg_lun *curlun, const char *buf, size_t count)
 {
@@ -429,7 +429,7 @@ ssize_t fsg_store_nofua(struct fsg_lun *curlun, const char *buf, size_t count)
 
 	return count;
 }
-EXPORT_SYMBOL(fsg_store_nofua);
+EXPORT_SYMBOL_GPL(fsg_store_nofua);
 
 ssize_t fsg_store_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
 		       const char *buf, size_t count)
@@ -460,7 +460,7 @@ ssize_t fsg_store_file(struct fsg_lun *curlun, struct rw_semaphore *filesem,
 	up_write(filesem);
 	return (rc < 0 ? rc : count);
 }
-EXPORT_SYMBOL(fsg_store_file);
+EXPORT_SYMBOL_GPL(fsg_store_file);
 
 ssize_t fsg_store_cdrom(struct fsg_lun *curlun, struct rw_semaphore *filesem,
 			const char *buf, size_t count)
@@ -483,7 +483,7 @@ ssize_t fsg_store_cdrom(struct fsg_lun *curlun, struct rw_semaphore *filesem,
 
 	return ret;
 }
-EXPORT_SYMBOL(fsg_store_cdrom);
+EXPORT_SYMBOL_GPL(fsg_store_cdrom);
 
 ssize_t fsg_store_removable(struct fsg_lun *curlun, const char *buf,
 			    size_t count)
@@ -499,6 +499,6 @@ ssize_t fsg_store_removable(struct fsg_lun *curlun, const char *buf,
 
 	return count;
 }
-EXPORT_SYMBOL(fsg_store_removable);
+EXPORT_SYMBOL_GPL(fsg_store_removable);
 
 MODULE_LICENSE("GPL");
diff --git a/drivers/usb/gadget/tcm_usb_gadget.c b/drivers/usb/gadget/tcm_usb_gadget.c
index f058c0368d61..49481e0a3382 100644
--- a/drivers/usb/gadget/tcm_usb_gadget.c
+++ b/drivers/usb/gadget/tcm_usb_gadget.c
@@ -1383,10 +1383,8 @@ static struct se_node_acl *usbg_alloc_fabric_acl(struct se_portal_group *se_tpg)
 	struct usbg_nacl *nacl;
 
 	nacl = kzalloc(sizeof(struct usbg_nacl), GFP_KERNEL);
-	if (!nacl) {
-		printk(KERN_ERR "Unable to allocate struct usbg_nacl\n");
+	if (!nacl)
 		return NULL;
-	}
 
 	return &nacl->se_node_acl;
 }
@@ -1561,10 +1559,8 @@ static struct se_portal_group *usbg_make_tpg(
 	}
 
 	tpg = kzalloc(sizeof(struct usbg_tpg), GFP_KERNEL);
-	if (!tpg) {
-		printk(KERN_ERR "Unable to allocate struct usbg_tpg");
+	if (!tpg)
 		return ERR_PTR(-ENOMEM);
-	}
 	mutex_init(&tpg->tpg_mutex);
 	atomic_set(&tpg->tpg_port_count, 0);
 	tpg->workqueue = alloc_workqueue("tcm_usb_gadget", 0, 1);
@@ -1613,10 +1609,8 @@ static struct se_wwn *usbg_make_tport(
 		return ERR_PTR(-EINVAL);
 
 	tport = kzalloc(sizeof(struct usbg_tport), GFP_KERNEL);
-	if (!(tport)) {
-		printk(KERN_ERR "Unable to allocate struct usbg_tport");
+	if (!(tport))
 		return ERR_PTR(-ENOMEM);
-	}
 	tport->tport_wwpn = wwpn;
 	snprintf(tport->tport_name, sizeof(tport->tport_name), "%s", wnn_name);
 	return &tport->tport_wwn;
@@ -1727,10 +1721,8 @@ static int tcm_usbg_make_nexus(struct usbg_tpg *tpg, char *name)
 
 	ret = -ENOMEM;
 	tv_nexus = kzalloc(sizeof(*tv_nexus), GFP_KERNEL);
-	if (!tv_nexus) {
-		pr_err("Unable to allocate struct tcm_vhost_nexus\n");
+	if (!tv_nexus)
 		goto err_unlock;
-	}
 	tv_nexus->tvn_se_sess = transport_init_session(TARGET_PROT_NORMAL);
 	if (IS_ERR(tv_nexus->tvn_se_sess))
 		goto err_free;
diff --git a/drivers/usb/gadget/u_ether.c b/drivers/usb/gadget/u_ether.c
index b7d4f82872b7..fe0880d0873e 100644
--- a/drivers/usb/gadget/u_ether.c
+++ b/drivers/usb/gadget/u_ether.c
@@ -818,7 +818,7 @@ struct eth_dev *gether_setup_name(struct usb_gadget *g,
 
 	return dev;
 }
-EXPORT_SYMBOL(gether_setup_name);
+EXPORT_SYMBOL_GPL(gether_setup_name);
 
 struct net_device *gether_setup_name_default(const char *netname)
 {
@@ -855,7 +855,7 @@ struct net_device *gether_setup_name_default(const char *netname)
 
 	return net;
 }
-EXPORT_SYMBOL(gether_setup_name_default);
+EXPORT_SYMBOL_GPL(gether_setup_name_default);
 
 int gether_register_netdev(struct net_device *net)
 {
@@ -893,7 +893,7 @@ int gether_register_netdev(struct net_device *net)
 
 	return status;
 }
-EXPORT_SYMBOL(gether_register_netdev);
+EXPORT_SYMBOL_GPL(gether_register_netdev);
 
 void gether_set_gadget(struct net_device *net, struct usb_gadget *g)
 {
@@ -903,7 +903,7 @@ void gether_set_gadget(struct net_device *net, struct usb_gadget *g)
 	dev->gadget = g;
 	SET_NETDEV_DEV(net, &g->dev);
 }
-EXPORT_SYMBOL(gether_set_gadget);
+EXPORT_SYMBOL_GPL(gether_set_gadget);
 
 int gether_set_dev_addr(struct net_device *net, const char *dev_addr)
 {
@@ -916,7 +916,7 @@ int gether_set_dev_addr(struct net_device *net, const char *dev_addr)
 	memcpy(dev->dev_mac, new_addr, ETH_ALEN);
 	return 0;
 }
-EXPORT_SYMBOL(gether_set_dev_addr);
+EXPORT_SYMBOL_GPL(gether_set_dev_addr);
 
 int gether_get_dev_addr(struct net_device *net, char *dev_addr, int len)
 {
@@ -925,7 +925,7 @@ int gether_get_dev_addr(struct net_device *net, char *dev_addr, int len)
 	dev = netdev_priv(net);
 	return get_ether_addr_str(dev->dev_mac, dev_addr, len);
 }
-EXPORT_SYMBOL(gether_get_dev_addr);
+EXPORT_SYMBOL_GPL(gether_get_dev_addr);
 
 int gether_set_host_addr(struct net_device *net, const char *host_addr)
 {
@@ -938,7 +938,7 @@ int gether_set_host_addr(struct net_device *net, const char *host_addr)
 	memcpy(dev->host_mac, new_addr, ETH_ALEN);
 	return 0;
 }
-EXPORT_SYMBOL(gether_set_host_addr);
+EXPORT_SYMBOL_GPL(gether_set_host_addr);
 
 int gether_get_host_addr(struct net_device *net, char *host_addr, int len)
 {
@@ -947,7 +947,7 @@ int gether_get_host_addr(struct net_device *net, char *host_addr, int len)
 	dev = netdev_priv(net);
 	return get_ether_addr_str(dev->host_mac, host_addr, len);
 }
-EXPORT_SYMBOL(gether_get_host_addr);
+EXPORT_SYMBOL_GPL(gether_get_host_addr);
 
 int gether_get_host_addr_cdc(struct net_device *net, char *host_addr, int len)
 {
@@ -961,7 +961,7 @@ int gether_get_host_addr_cdc(struct net_device *net, char *host_addr, int len)
 
 	return strlen(host_addr);
 }
-EXPORT_SYMBOL(gether_get_host_addr_cdc);
+EXPORT_SYMBOL_GPL(gether_get_host_addr_cdc);
 
 void gether_get_host_addr_u8(struct net_device *net, u8 host_mac[ETH_ALEN])
 {
@@ -970,7 +970,7 @@ void gether_get_host_addr_u8(struct net_device *net, u8 host_mac[ETH_ALEN])
 	dev = netdev_priv(net);
 	memcpy(host_mac, dev->host_mac, ETH_ALEN);
 }
-EXPORT_SYMBOL(gether_get_host_addr_u8);
+EXPORT_SYMBOL_GPL(gether_get_host_addr_u8);
 
 void gether_set_qmult(struct net_device *net, unsigned qmult)
 {
@@ -979,7 +979,7 @@ void gether_set_qmult(struct net_device *net, unsigned qmult)
 	dev = netdev_priv(net);
 	dev->qmult = qmult;
 }
-EXPORT_SYMBOL(gether_set_qmult);
+EXPORT_SYMBOL_GPL(gether_set_qmult);
 
 unsigned gether_get_qmult(struct net_device *net)
 {
@@ -988,7 +988,7 @@ unsigned gether_get_qmult(struct net_device *net)
 	dev = netdev_priv(net);
 	return dev->qmult;
 }
-EXPORT_SYMBOL(gether_get_qmult);
+EXPORT_SYMBOL_GPL(gether_get_qmult);
 
 int gether_get_ifname(struct net_device *net, char *name, int len)
 {
@@ -997,7 +997,7 @@ int gether_get_ifname(struct net_device *net, char *name, int len)
 	rtnl_unlock();
 	return strlen(name);
 }
-EXPORT_SYMBOL(gether_get_ifname);
+EXPORT_SYMBOL_GPL(gether_get_ifname);
 
 /**
  * gether_cleanup - remove Ethernet-over-USB device
@@ -1014,7 +1014,7 @@ void gether_cleanup(struct eth_dev *dev)
 	flush_work(&dev->work);
 	free_netdev(dev->net);
 }
-EXPORT_SYMBOL(gether_cleanup);
+EXPORT_SYMBOL_GPL(gether_cleanup);
 
 /**
  * gether_connect - notify network layer that USB link is active
@@ -1095,7 +1095,7 @@ fail0:
 		return ERR_PTR(result);
 	return dev->net;
 }
-EXPORT_SYMBOL(gether_connect);
+EXPORT_SYMBOL_GPL(gether_connect);
 
 /**
  * gether_disconnect - notify network layer that USB link is inactive
@@ -1166,7 +1166,7 @@ void gether_disconnect(struct gether *link)
 	dev->port_usb = NULL;
 	spin_unlock(&dev->lock);
 }
-EXPORT_SYMBOL(gether_disconnect);
+EXPORT_SYMBOL_GPL(gether_disconnect);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("David Brownell");
diff --git a/drivers/usb/gadget/u_f.c b/drivers/usb/gadget/u_f.c
index 63b6642c162b..c6276f0268ae 100644
--- a/drivers/usb/gadget/u_f.c
+++ b/drivers/usb/gadget/u_f.c
@@ -29,4 +29,4 @@ struct usb_request *alloc_ep_req(struct usb_ep *ep, int len, int default_len)
 	}
 	return req;
 }
-EXPORT_SYMBOL(alloc_ep_req);
+EXPORT_SYMBOL_GPL(alloc_ep_req);
diff --git a/drivers/usb/gadget/u_f.h b/drivers/usb/gadget/u_f.h
index 71034c061fca..1d5f0eb68552 100644
--- a/drivers/usb/gadget/u_f.h
+++ b/drivers/usb/gadget/u_f.h
@@ -16,6 +16,32 @@
 #ifndef __U_F_H__
 #define __U_F_H__
 
+/* Variable Length Array Macros **********************************************/
+#define vla_group(groupname) size_t groupname##__next = 0
+#define vla_group_size(groupname) groupname##__next
+
+#define vla_item(groupname, type, name, n) \
+	size_t groupname##_##name##__offset = ({			       \
+		size_t align_mask = __alignof__(type) - 1;		       \
+		size_t offset = (groupname##__next + align_mask) & ~align_mask;\
+		size_t size = (n) * sizeof(type);			       \
+		groupname##__next = offset + size;			       \
+		offset;							       \
+	})
+
+#define vla_item_with_sz(groupname, type, name, n) \
+	size_t groupname##_##name##__sz = (n) * sizeof(type);		       \
+	size_t groupname##_##name##__offset = ({			       \
+		size_t align_mask = __alignof__(type) - 1;		       \
+		size_t offset = (groupname##__next + align_mask) & ~align_mask;\
+		size_t size = groupname##_##name##__sz;			       \
+		groupname##__next = offset + size;			       \
+		offset;							       \
+	})
+
+#define vla_ptr(ptr, groupname, name) \
+	((void *) ((char *)ptr + groupname##_##name##__offset))
+
 struct usb_ep;
 struct usb_request;
 
diff --git a/drivers/usb/gadget/u_os_desc.h b/drivers/usb/gadget/u_os_desc.h
new file mode 100644
index 000000000000..ea5cf8c2da28
--- /dev/null
+++ b/drivers/usb/gadget/u_os_desc.h
@@ -0,0 +1,90 @@
+/*
+ * u_os_desc.h
+ *
+ * Utility definitions for "OS Descriptors" support
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __U_OS_DESC_H__
+#define __U_OS_DESC_H__
+
+#include <asm/unaligned.h>
+#include <linux/nls.h>
+
+#define USB_EXT_PROP_DW_SIZE			0
+#define USB_EXT_PROP_DW_PROPERTY_DATA_TYPE	4
+#define USB_EXT_PROP_W_PROPERTY_NAME_LENGTH	8
+#define USB_EXT_PROP_B_PROPERTY_NAME		10
+#define USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH	10
+#define USB_EXT_PROP_B_PROPERTY_DATA		14
+
+#define USB_EXT_PROP_RESERVED			0
+#define USB_EXT_PROP_UNICODE			1
+#define USB_EXT_PROP_UNICODE_ENV		2
+#define USB_EXT_PROP_BINARY			3
+#define USB_EXT_PROP_LE32			4
+#define USB_EXT_PROP_BE32			5
+#define USB_EXT_PROP_UNICODE_LINK		6
+#define USB_EXT_PROP_UNICODE_MULTI		7
+
+static inline void usb_ext_prop_put_size(u8 *buf, int dw_size)
+{
+	put_unaligned_le32(dw_size, &buf[USB_EXT_PROP_DW_SIZE]);
+}
+
+static inline void usb_ext_prop_put_type(u8 *buf, int type)
+{
+	put_unaligned_le32(type, &buf[USB_EXT_PROP_DW_PROPERTY_DATA_TYPE]);
+}
+
+static inline int usb_ext_prop_put_name(u8 *buf, const char *name, int pnl)
+{
+	int result;
+
+	put_unaligned_le16(pnl, &buf[USB_EXT_PROP_W_PROPERTY_NAME_LENGTH]);
+	result = utf8s_to_utf16s(name, strlen(name), UTF16_LITTLE_ENDIAN,
+		(wchar_t *) &buf[USB_EXT_PROP_B_PROPERTY_NAME], pnl - 2);
+	if (result < 0)
+		return result;
+
+	put_unaligned_le16(0, &buf[USB_EXT_PROP_B_PROPERTY_NAME + pnl]);
+
+	return pnl;
+}
+
+static inline void usb_ext_prop_put_binary(u8 *buf, int pnl, const u8 *data,
+					   int data_len)
+{
+	put_unaligned_le32(data_len,
+			   &buf[USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH + pnl]);
+	memcpy(&buf[USB_EXT_PROP_B_PROPERTY_DATA + pnl], data, data_len);
+}
+
+static inline int usb_ext_prop_put_unicode(u8 *buf, int pnl, const char *string,
+					   int data_len)
+{
+	int result;
+	put_unaligned_le32(data_len,
+			&buf[USB_EXT_PROP_DW_PROPERTY_DATA_LENGTH + pnl]);
+
+	result = utf8s_to_utf16s(string, data_len >> 1, UTF16_LITTLE_ENDIAN,
+			(wchar_t *) &buf[USB_EXT_PROP_B_PROPERTY_DATA + pnl],
+			data_len - 2);
+	if (result < 0)
+		return result;
+
+	put_unaligned_le16(0,
+			&buf[USB_EXT_PROP_B_PROPERTY_DATA + pnl + data_len]);
+
+	return data_len;
+}
+
+#endif /* __U_OS_DESC_H__ */
diff --git a/drivers/usb/gadget/u_rndis.h b/drivers/usb/gadget/u_rndis.h
index 7291b15c9dce..e902aa42a297 100644
--- a/drivers/usb/gadget/u_rndis.h
+++ b/drivers/usb/gadget/u_rndis.h
@@ -26,6 +26,9 @@ struct f_rndis_opts {
 	bool				bound;
 	bool				borrowed_net;
 
+	struct usb_os_desc		rndis_os_desc;
+	char				rndis_ext_compat_id[16];
+
 	/*
 	 * Read/write access to configfs attributes is handled by configfs.
 	 *
diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c
index 27768a7d986a..b0d98172bc07 100644
--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -428,6 +428,8 @@ int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
 	list_for_each_entry(udc, &udc_list, list)
 		if (udc->driver == driver) {
 			usb_gadget_remove_driver(udc);
+			usb_gadget_set_state(udc->gadget,
+					USB_STATE_NOTATTACHED);
 			ret = 0;
 			break;
 		}
diff --git a/drivers/usb/gadget/uvc_queue.c b/drivers/usb/gadget/uvc_queue.c
index 0bb5d50075de..1c29bc954db9 100644
--- a/drivers/usb/gadget/uvc_queue.c
+++ b/drivers/usb/gadget/uvc_queue.c
@@ -20,6 +20,7 @@
 #include <linux/vmalloc.h>
 #include <linux/wait.h>
 
+#include <media/v4l2-common.h>
 #include <media/videobuf2-vmalloc.h>
 
 #include "uvc.h"
@@ -136,6 +137,8 @@ static int uvc_queue_init(struct uvc_video_queue *queue,
 	queue->queue.buf_struct_size = sizeof(struct uvc_buffer);
 	queue->queue.ops = &uvc_queue_qops;
 	queue->queue.mem_ops = &vb2_vmalloc_memops;
+	queue->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
+				     | V4L2_BUF_FLAG_TSTAMP_SRC_EOF;
 	ret = vb2_queue_init(&queue->queue);
 	if (ret)
 		return ret;
@@ -379,14 +382,9 @@ static struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue,
 	else
 		nextbuf = NULL;
 
-	/*
-	 * FIXME: with videobuf2, the sequence number or timestamp fields
-	 * are valid only for video capture devices and the UVC gadget usually
-	 * is a video output device. Keeping these until the specs are clear on
-	 * this aspect.
-	 */
+	buf->buf.v4l2_buf.field = V4L2_FIELD_NONE;
 	buf->buf.v4l2_buf.sequence = queue->sequence++;
-	do_gettimeofday(&buf->buf.v4l2_buf.timestamp);
+	v4l2_get_timestamp(&buf->buf.v4l2_buf.timestamp);
 
 	vb2_set_plane_payload(&buf->buf, 0, buf->bytesused);
 	vb2_buffer_done(&buf->buf, VB2_BUF_STATE_DONE);