Merge tag 'usb-3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb

Pull USB fixes from Greg KH:
 "Here are a bunch of fixes for the USB drivers for 3.17-rc3.

  Also in here is the movement of the usbip driver out of staging, into
  the "real" part of the kernel, it had to wait until after -rc1 to
  handle the merge issues involved between the USB and staging trees.
  The code is identical, just file movements there.

  The USB fixes are all over the place, new device ids, xhci fixes for
  reported issues and the usual gadget driver fixes as well.  All have
  been in linux-next for a while now"

* tag 'usb-3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (46 commits)
  USB: fix build error with CONFIG_PM_RUNTIME disabled
  Revert "usb: ehci/ohci-exynos: Fix PHY getting sequence"
  xhci: Disable streams on Via XHCI with device-id 0x3432
  USB: serial: fix potential heap buffer overflow
  USB: serial: fix potential stack buffer overflow
  usb: ehci/ohci-exynos: Fix PHY getting sequence
  usb: hub: Prevent hub autosuspend if usbcore.autosuspend is -1
  USB: sisusb: add device id for Magic Control USB video
  usb: dwc2: gadget: Set the default EP max packet value as 8 bytes
  usb: ehci: using wIndex + 1 for hub port
  USB: storage: add quirk for Newer Technology uSCSI SCSI-USB converter
  MAINTAINERS: Add an entry for USB/IP driver
  usbip: remove struct usb_device_id table
  usbip: move usbip kernel code out of staging
  usbip: move usbip userspace code out of staging
  USB: whiteheat: Added bounds checking for bulk command response
  usb: gadget: remove $(PWD) in ccflags-y
  usb: pch_udc: usb gadget device support for Intel Quark X1000
  usb: gadget: uvc: fix possible lockup in uvc gadget
  usb: wusbcore: fix below build warning
  ...

1 files changed, 224 insertions, 0 deletions

diff --git a/drivers/usb/usbip/vhci_tx.c b/drivers/usb/usbip/vhci_tx.c
new file mode 100644
index 000000000000..409fd99f3257
--- /dev/null
+++ b/drivers/usb/usbip/vhci_tx.c
@@ -0,0 +1,224 @@
+/*
+ * Copyright (C) 2003-2008 Takahiro Hirofuchi
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+ * USA.
+ */
+
+#include <linux/kthread.h>
+#include <linux/slab.h>
+
+#include "usbip_common.h"
+#include "vhci.h"
+
+static void setup_cmd_submit_pdu(struct usbip_header *pdup,  struct urb *urb)
+{
+	struct vhci_priv *priv = ((struct vhci_priv *)urb->hcpriv);
+	struct vhci_device *vdev = priv->vdev;
+
+	usbip_dbg_vhci_tx("URB, local devnum %u, remote devid %u\n",
+			  usb_pipedevice(urb->pipe), vdev->devid);
+
+	pdup->base.command   = USBIP_CMD_SUBMIT;
+	pdup->base.seqnum    = priv->seqnum;
+	pdup->base.devid     = vdev->devid;
+	pdup->base.direction = usb_pipein(urb->pipe) ?
+		USBIP_DIR_IN : USBIP_DIR_OUT;
+	pdup->base.ep	     = usb_pipeendpoint(urb->pipe);
+
+	usbip_pack_pdu(pdup, urb, USBIP_CMD_SUBMIT, 1);
+
+	if (urb->setup_packet)
+		memcpy(pdup->u.cmd_submit.setup, urb->setup_packet, 8);
+}
+
+static struct vhci_priv *dequeue_from_priv_tx(struct vhci_device *vdev)
+{
+	struct vhci_priv *priv, *tmp;
+
+	spin_lock(&vdev->priv_lock);
+
+	list_for_each_entry_safe(priv, tmp, &vdev->priv_tx, list) {
+		list_move_tail(&priv->list, &vdev->priv_rx);
+		spin_unlock(&vdev->priv_lock);
+		return priv;
+	}
+
+	spin_unlock(&vdev->priv_lock);
+
+	return NULL;
+}
+
+static int vhci_send_cmd_submit(struct vhci_device *vdev)
+{
+	struct vhci_priv *priv = NULL;
+
+	struct msghdr msg;
+	struct kvec iov[3];
+	size_t txsize;
+
+	size_t total_size = 0;
+
+	while ((priv = dequeue_from_priv_tx(vdev)) != NULL) {
+		int ret;
+		struct urb *urb = priv->urb;
+		struct usbip_header pdu_header;
+		struct usbip_iso_packet_descriptor *iso_buffer = NULL;
+
+		txsize = 0;
+		memset(&pdu_header, 0, sizeof(pdu_header));
+		memset(&msg, 0, sizeof(msg));
+		memset(&iov, 0, sizeof(iov));
+
+		usbip_dbg_vhci_tx("setup txdata urb %p\n", urb);
+
+		/* 1. setup usbip_header */
+		setup_cmd_submit_pdu(&pdu_header, urb);
+		usbip_header_correct_endian(&pdu_header, 1);
+
+		iov[0].iov_base = &pdu_header;
+		iov[0].iov_len  = sizeof(pdu_header);
+		txsize += sizeof(pdu_header);
+
+		/* 2. setup transfer buffer */
+		if (!usb_pipein(urb->pipe) && urb->transfer_buffer_length > 0) {
+			iov[1].iov_base = urb->transfer_buffer;
+			iov[1].iov_len  = urb->transfer_buffer_length;
+			txsize += urb->transfer_buffer_length;
+		}
+
+		/* 3. setup iso_packet_descriptor */
+		if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS) {
+			ssize_t len = 0;
+
+			iso_buffer = usbip_alloc_iso_desc_pdu(urb, &len);
+			if (!iso_buffer) {
+				usbip_event_add(&vdev->ud,
+						SDEV_EVENT_ERROR_MALLOC);
+				return -1;
+			}
+
+			iov[2].iov_base = iso_buffer;
+			iov[2].iov_len  = len;
+			txsize += len;
+		}
+
+		ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 3, txsize);
+		if (ret != txsize) {
+			pr_err("sendmsg failed!, ret=%d for %zd\n", ret,
+			       txsize);
+			kfree(iso_buffer);
+			usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
+			return -1;
+		}
+
+		kfree(iso_buffer);
+		usbip_dbg_vhci_tx("send txdata\n");
+
+		total_size += txsize;
+	}
+
+	return total_size;
+}
+
+static struct vhci_unlink *dequeue_from_unlink_tx(struct vhci_device *vdev)
+{
+	struct vhci_unlink *unlink, *tmp;
+
+	spin_lock(&vdev->priv_lock);
+
+	list_for_each_entry_safe(unlink, tmp, &vdev->unlink_tx, list) {
+		list_move_tail(&unlink->list, &vdev->unlink_rx);
+		spin_unlock(&vdev->priv_lock);
+		return unlink;
+	}
+
+	spin_unlock(&vdev->priv_lock);
+
+	return NULL;
+}
+
+static int vhci_send_cmd_unlink(struct vhci_device *vdev)
+{
+	struct vhci_unlink *unlink = NULL;
+
+	struct msghdr msg;
+	struct kvec iov[3];
+	size_t txsize;
+
+	size_t total_size = 0;
+
+	while ((unlink = dequeue_from_unlink_tx(vdev)) != NULL) {
+		int ret;
+		struct usbip_header pdu_header;
+
+		txsize = 0;
+		memset(&pdu_header, 0, sizeof(pdu_header));
+		memset(&msg, 0, sizeof(msg));
+		memset(&iov, 0, sizeof(iov));
+
+		usbip_dbg_vhci_tx("setup cmd unlink, %lu\n", unlink->seqnum);
+
+		/* 1. setup usbip_header */
+		pdu_header.base.command = USBIP_CMD_UNLINK;
+		pdu_header.base.seqnum  = unlink->seqnum;
+		pdu_header.base.devid	= vdev->devid;
+		pdu_header.base.ep	= 0;
+		pdu_header.u.cmd_unlink.seqnum = unlink->unlink_seqnum;
+
+		usbip_header_correct_endian(&pdu_header, 1);
+
+		iov[0].iov_base = &pdu_header;
+		iov[0].iov_len  = sizeof(pdu_header);
+		txsize += sizeof(pdu_header);
+
+		ret = kernel_sendmsg(vdev->ud.tcp_socket, &msg, iov, 1, txsize);
+		if (ret != txsize) {
+			pr_err("sendmsg failed!, ret=%d for %zd\n", ret,
+			       txsize);
+			usbip_event_add(&vdev->ud, VDEV_EVENT_ERROR_TCP);
+			return -1;
+		}
+
+		usbip_dbg_vhci_tx("send txdata\n");
+
+		total_size += txsize;
+	}
+
+	return total_size;
+}
+
+int vhci_tx_loop(void *data)
+{
+	struct usbip_device *ud = data;
+	struct vhci_device *vdev = container_of(ud, struct vhci_device, ud);
+
+	while (!kthread_should_stop()) {
+		if (vhci_send_cmd_submit(vdev) < 0)
+			break;
+
+		if (vhci_send_cmd_unlink(vdev) < 0)
+			break;
+
+		wait_event_interruptible(vdev->waitq_tx,
+					 (!list_empty(&vdev->priv_tx) ||
+					  !list_empty(&vdev->unlink_tx) ||
+					  kthread_should_stop()));
+
+		usbip_dbg_vhci_tx("pending urbs ?, now wake up\n");
+	}
+
+	return 0;
+}