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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>
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2 changed files with 26 additions and 12 deletions
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@ -968,20 +968,29 @@ static void hid_retry_timeout(unsigned long _hid)
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hid_io_error(hid);
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}
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/* Workqueue routine to reset the device */
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/* Workqueue routine to reset the device or clear a halt */
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static void hid_reset(void *_hid)
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{
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struct hid_device *hid = (struct hid_device *) _hid;
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int rc_lock, rc;
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int rc_lock, rc = 0;
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dev_dbg(&hid->intf->dev, "resetting device\n");
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rc = rc_lock = usb_lock_device_for_reset(hid->dev, hid->intf);
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if (rc_lock >= 0) {
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rc = usb_reset_composite_device(hid->dev, hid->intf);
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if (rc_lock)
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usb_unlock_device(hid->dev);
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if (test_bit(HID_CLEAR_HALT, &hid->iofl)) {
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dev_dbg(&hid->intf->dev, "clear halt\n");
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rc = usb_clear_halt(hid->dev, hid->urbin->pipe);
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clear_bit(HID_CLEAR_HALT, &hid->iofl);
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hid_start_in(hid);
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}
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else if (test_bit(HID_RESET_PENDING, &hid->iofl)) {
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dev_dbg(&hid->intf->dev, "resetting device\n");
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rc = rc_lock = usb_lock_device_for_reset(hid->dev, hid->intf);
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if (rc_lock >= 0) {
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rc = usb_reset_composite_device(hid->dev, hid->intf);
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if (rc_lock)
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usb_unlock_device(hid->dev);
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}
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clear_bit(HID_RESET_PENDING, &hid->iofl);
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}
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clear_bit(HID_RESET_PENDING, &hid->iofl);
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switch (rc) {
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case 0:
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@ -1023,9 +1032,8 @@ static void hid_io_error(struct hid_device *hid)
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/* Retries failed, so do a port reset */
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if (!test_and_set_bit(HID_RESET_PENDING, &hid->iofl)) {
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if (schedule_work(&hid->reset_work))
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goto done;
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clear_bit(HID_RESET_PENDING, &hid->iofl);
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schedule_work(&hid->reset_work);
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goto done;
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}
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}
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@ -1049,6 +1057,11 @@ static void hid_irq_in(struct urb *urb)
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hid->retry_delay = 0;
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hid_input_report(HID_INPUT_REPORT, urb, 1);
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break;
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case -EPIPE: /* stall */
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clear_bit(HID_IN_RUNNING, &hid->iofl);
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set_bit(HID_CLEAR_HALT, &hid->iofl);
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schedule_work(&hid->reset_work);
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return;
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case -ECONNRESET: /* unlink */
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case -ENOENT:
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case -ESHUTDOWN: /* unplug */
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@ -385,6 +385,7 @@ struct hid_control_fifo {
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#define HID_IN_RUNNING 3
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#define HID_RESET_PENDING 4
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#define HID_SUSPENDED 5
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#define HID_CLEAR_HALT 6
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struct hid_input {
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struct list_head list;
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