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path: root/drivers/usb/serial/keyspan_pda.c
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Diffstat (limited to 'drivers/usb/serial/keyspan_pda.c')
-rw-r--r--drivers/usb/serial/keyspan_pda.c53
1 files changed, 37 insertions, 16 deletions
diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c
index 84f08e968e0b..185fe9a7d4e0 100644
--- a/drivers/usb/serial/keyspan_pda.c
+++ b/drivers/usb/serial/keyspan_pda.c
@@ -125,7 +125,7 @@ struct keyspan_pda_private {
#define ENTREGRA_VENDOR_ID 0x1645
#define ENTREGRA_FAKE_ID 0x8093
-static struct usb_device_id id_table_combined [] = {
+static const struct usb_device_id id_table_combined[] = {
#ifdef KEYSPAN
{ USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
#endif
@@ -147,20 +147,20 @@ static struct usb_driver keyspan_pda_driver = {
.no_dynamic_id = 1,
};
-static struct usb_device_id id_table_std [] = {
+static const struct usb_device_id id_table_std[] = {
{ USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
{ } /* Terminating entry */
};
#ifdef KEYSPAN
-static struct usb_device_id id_table_fake [] = {
+static const struct usb_device_id id_table_fake[] = {
{ USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
{ } /* Terminating entry */
};
#endif
#ifdef XIRCOM
-static struct usb_device_id id_table_fake_xircom [] = {
+static const struct usb_device_id id_table_fake_xircom[] = {
{ USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
{ USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
{ }
@@ -429,13 +429,20 @@ static int keyspan_pda_get_modem_info(struct usb_serial *serial,
unsigned char *value)
{
int rc;
- unsigned char data;
+ u8 *data;
+
+ data = kmalloc(1, GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
3, /* get pins */
USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
- 0, 0, &data, 1, 2000);
+ 0, 0, data, 1, 2000);
if (rc >= 0)
- *value = data;
+ *value = *data;
+
+ kfree(data);
return rc;
}
@@ -543,7 +550,14 @@ static int keyspan_pda_write(struct tty_struct *tty,
device how much room it really has. This is done only on
scheduler time, since usb_control_msg() sleeps. */
if (count > priv->tx_room && !in_interrupt()) {
- unsigned char room;
+ u8 *room;
+
+ room = kmalloc(1, GFP_KERNEL);
+ if (!room) {
+ rc = -ENOMEM;
+ goto exit;
+ }
+
rc = usb_control_msg(serial->dev,
usb_rcvctrlpipe(serial->dev, 0),
6, /* write_room */
@@ -551,9 +565,14 @@ static int keyspan_pda_write(struct tty_struct *tty,
| USB_DIR_IN,
0, /* value: 0 means "remaining room" */
0, /* index */
- &room,
+ room,
1,
2000);
+ if (rc > 0) {
+ dbg(" roomquery says %d", *room);
+ priv->tx_room = *room;
+ }
+ kfree(room);
if (rc < 0) {
dbg(" roomquery failed");
goto exit;
@@ -563,8 +582,6 @@ static int keyspan_pda_write(struct tty_struct *tty,
rc = -EIO; /* device didn't return any data */
goto exit;
}
- dbg(" roomquery says %d", room);
- priv->tx_room = room;
}
if (count > priv->tx_room) {
/* we're about to completely fill the Tx buffer, so
@@ -684,18 +701,22 @@ static int keyspan_pda_open(struct tty_struct *tty,
struct usb_serial_port *port)
{
struct usb_serial *serial = port->serial;
- unsigned char room;
+ u8 *room;
int rc = 0;
struct keyspan_pda_private *priv;
/* find out how much room is in the Tx ring */
+ room = kmalloc(1, GFP_KERNEL);
+ if (!room)
+ return -ENOMEM;
+
rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
6, /* write_room */
USB_TYPE_VENDOR | USB_RECIP_INTERFACE
| USB_DIR_IN,
0, /* value */
0, /* index */
- &room,
+ room,
1,
2000);
if (rc < 0) {
@@ -708,8 +729,8 @@ static int keyspan_pda_open(struct tty_struct *tty,
goto error;
}
priv = usb_get_serial_port_data(port);
- priv->tx_room = room;
- priv->tx_throttled = room ? 0 : 1;
+ priv->tx_room = *room;
+ priv->tx_throttled = *room ? 0 : 1;
/*Start reading from the device*/
port->interrupt_in_urb->dev = serial->dev;
@@ -718,8 +739,8 @@ static int keyspan_pda_open(struct tty_struct *tty,
dbg("%s - usb_submit_urb(read int) failed", __func__);
goto error;
}
-
error:
+ kfree(room);
return rc;
}
static void keyspan_pda_close(struct usb_serial_port *port)