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authorMartin Fuzzey <mfuzzey@gmail.com>2009-06-05 01:20:38 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2009-06-16 08:44:48 +0400
commit3b6c023f831e3179c42bbcff189c73628cd5ea4c (patch)
tree491881253c6cf921e16695988efe10e2a92ebe2f /drivers/usb/misc
parente60c65d35951ef3527596442338c371ea16d55ed (diff)
downloadlinux-3b6c023f831e3179c42bbcff189c73628cd5ea4c.tar.xz
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>
Diffstat (limited to 'drivers/usb/misc')
-rw-r--r--drivers/usb/misc/usbtest.c39
1 files changed, 25 insertions, 14 deletions
diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c
index 5f1a19d1497d..a9f06d76960f 100644
--- a/drivers/usb/misc/usbtest.c
+++ b/drivers/usb/misc/usbtest.c
@@ -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;