mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-28 20:02:17 +00:00
USB HID: Handle STALL on interrupt endpoint
The USB HID driver doesn't include any code to handle a STALL on the interrupt endpoint. While this may be uncommon, it does happen sometimes. This patch (as805) adds a fix. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
parent
88fafff9d7
commit
6d8fc4d28d
2 changed files with 26 additions and 12 deletions
|
@ -968,20 +968,29 @@ static void hid_retry_timeout(unsigned long _hid)
|
|||
hid_io_error(hid);
|
||||
}
|
||||
|
||||
/* Workqueue routine to reset the device */
|
||||
/* Workqueue routine to reset the device or clear a halt */
|
||||
static void hid_reset(void *_hid)
|
||||
{
|
||||
struct hid_device *hid = (struct hid_device *) _hid;
|
||||
int rc_lock, rc;
|
||||
int rc_lock, rc = 0;
|
||||
|
||||
dev_dbg(&hid->intf->dev, "resetting device\n");
|
||||
rc = rc_lock = usb_lock_device_for_reset(hid->dev, hid->intf);
|
||||
if (rc_lock >= 0) {
|
||||
rc = usb_reset_composite_device(hid->dev, hid->intf);
|
||||
if (rc_lock)
|
||||
usb_unlock_device(hid->dev);
|
||||
if (test_bit(HID_CLEAR_HALT, &hid->iofl)) {
|
||||
dev_dbg(&hid->intf->dev, "clear halt\n");
|
||||
rc = usb_clear_halt(hid->dev, hid->urbin->pipe);
|
||||
clear_bit(HID_CLEAR_HALT, &hid->iofl);
|
||||
hid_start_in(hid);
|
||||
}
|
||||
|
||||
else if (test_bit(HID_RESET_PENDING, &hid->iofl)) {
|
||||
dev_dbg(&hid->intf->dev, "resetting device\n");
|
||||
rc = rc_lock = usb_lock_device_for_reset(hid->dev, hid->intf);
|
||||
if (rc_lock >= 0) {
|
||||
rc = usb_reset_composite_device(hid->dev, hid->intf);
|
||||
if (rc_lock)
|
||||
usb_unlock_device(hid->dev);
|
||||
}
|
||||
clear_bit(HID_RESET_PENDING, &hid->iofl);
|
||||
}
|
||||
clear_bit(HID_RESET_PENDING, &hid->iofl);
|
||||
|
||||
switch (rc) {
|
||||
case 0:
|
||||
|
@ -1023,9 +1032,8 @@ static void hid_io_error(struct hid_device *hid)
|
|||
|
||||
/* Retries failed, so do a port reset */
|
||||
if (!test_and_set_bit(HID_RESET_PENDING, &hid->iofl)) {
|
||||
if (schedule_work(&hid->reset_work))
|
||||
goto done;
|
||||
clear_bit(HID_RESET_PENDING, &hid->iofl);
|
||||
schedule_work(&hid->reset_work);
|
||||
goto done;
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -1049,6 +1057,11 @@ static void hid_irq_in(struct urb *urb)
|
|||
hid->retry_delay = 0;
|
||||
hid_input_report(HID_INPUT_REPORT, urb, 1);
|
||||
break;
|
||||
case -EPIPE: /* stall */
|
||||
clear_bit(HID_IN_RUNNING, &hid->iofl);
|
||||
set_bit(HID_CLEAR_HALT, &hid->iofl);
|
||||
schedule_work(&hid->reset_work);
|
||||
return;
|
||||
case -ECONNRESET: /* unlink */
|
||||
case -ENOENT:
|
||||
case -ESHUTDOWN: /* unplug */
|
||||
|
|
|
@ -385,6 +385,7 @@ struct hid_control_fifo {
|
|||
#define HID_IN_RUNNING 3
|
||||
#define HID_RESET_PENDING 4
|
||||
#define HID_SUSPENDED 5
|
||||
#define HID_CLEAR_HALT 6
|
||||
|
||||
struct hid_input {
|
||||
struct list_head list;
|
||||
|
|
Loading…
Reference in a new issue