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Commit 687ca639 authored by Kirill Kapranov's avatar Kirill Kapranov Committed by Greg Kroah-Hartman
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USB: adutux: Add waiting in transfer abortion 



Add waiting for an URB transmit finish that let the last URB to be sent
(to be not discarded) during 'release' procedure. W/o this waiting,the
last frame will be nearly always lost.

A test case: an attempt of sending a single frame:
echo -en "\001mk255" >/dev/adutux0

Signed-off-by: default avatarKirill Kapranov <kirill.kirillovich.kapranov@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 092bd5c2

drivers/usb/misc/adutux.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -132,6 +132,8 @@ static void adu_abort_transfers(struct adu_device *dev) 
	spin_lock_irqsave(&dev->buflock, flags);

	spin_lock_irqsave(&dev->buflock, flags);

	if (!dev->out_urb_finished) {

	if (!dev->out_urb_finished) {

		spin_unlock_irqrestore(&dev->buflock, flags);

		spin_unlock_irqrestore(&dev->buflock, flags);

		wait_event_timeout(dev->write_wait, dev->out_urb_finished,

			COMMAND_TIMEOUT);

		usb_kill_urb(dev->interrupt_out_urb);

		usb_kill_urb(dev->interrupt_out_urb);

	} else

	} else

		spin_unlock_irqrestore(&dev->buflock, flags);

		spin_unlock_irqrestore(&dev->buflock, flags);