From 205465b73f42313dee3f71baeb0fa7c7b4cf276d Mon Sep 17 00:00:00 2001 From: Martin Fuzzey Date: Thu, 4 Jun 2009 23:20:38 +0200 Subject: [PATCH] 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 Acked-by: David Brownell Signed-off-by: Greg Kroah-Hartman --- drivers/usb/misc/usbtest.c | 39 ++++++++++++++++++++++++-------------- 1 file changed, 25 insertions(+), 14 deletions(-) diff --git a/drivers/usb/misc/usbtest.c b/drivers/usb/misc/usbtest.c index 5f1a19d1497d1..a9f06d76960ff 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; -- 2.39.5