From: Kirill Kapranov Date: Sat, 17 Feb 2018 21:01:40 +0000 (+0200) Subject: USB: adutux: Add waiting in transfer abortion X-Git-Tag: v4.19~1304^2~70 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=687ca6395f10ac8a54fd5285dda91ed9efac9e23;p=platform%2Fkernel%2Flinux-rpi.git 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: Kirill Kapranov Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/usb/misc/adutux.c b/drivers/usb/misc/adutux.c index f7a2fe4..b3160af 100644 --- a/drivers/usb/misc/adutux.c +++ b/drivers/usb/misc/adutux.c @@ -132,6 +132,8 @@ static void adu_abort_transfers(struct adu_device *dev) spin_lock_irqsave(&dev->buflock, flags); if (!dev->out_urb_finished) { 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); } else spin_unlock_irqrestore(&dev->buflock, flags);