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USB: usbtest fix endless loop in unlink tests. 

In tests 11 and 12 if the URB completes with an error status (eg babble)
the asynchrous unlink entered an endless loop trying to unlink
a non resubmitted URB.

Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com>
Acked-by: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Martin Fuzzey 2009-06-04 23:20:38 +02:00 committed by Greg Kroah-Hartman
parent e60c65d359
commit 3b6c023f83
1 changed files with 25 additions and 14 deletions
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39
drivers/usb/misc/usbtest.c
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@ -1072,23 +1072,34 @@ static int unlink1 (struct usbtest_dev *dev, int pipe, int size, int async)
*/
msleep (jiffies % (2 * INTERRUPT_RATE));
if (async) {
retry:
retval = usb_unlink_urb (urb);
if (retval == -EBUSY || retval == -EIDRM) {
/* we can't unlink urbs while they're completing.
* or if they've completed, and we haven't resubmitted.
* "normal" drivers would prevent resubmission, but
* since we're testing unlink paths, we can't.
*/
ERROR(dev, "unlink retry\n");
goto retry;
while (!completion_done(&completion)) {
retval = usb_unlink_urb(urb);
switch (retval) {
case -EBUSY:
case -EIDRM:
/* we can't unlink urbs while they're completing
* or if they've completed, and we haven't
* resubmitted. "normal" drivers would prevent
* resubmission, but since we're testing unlink
* paths, we can't.
*/
ERROR(dev, "unlink retry\n");
continue;
case 0:
case -EINPROGRESS:
break;
default:
dev_err(&dev->intf->dev,
"unlink fail %d\n", retval);
return retval;
}
break;
}
} else
usb_kill_urb (urb);
if (!(retval == 0 || retval == -EINPROGRESS)) {
dev_err(&dev->intf->dev, "unlink fail %d\n", retval);
return retval;
}
wait_for_completion (&completion);
retval = urb->status;