staging: comedi: usbduxsigma: generalize the ai/ao usb_kill_urb()
Generalize a helper function to replace for() loops in usbduxsigma_{ai,ao}_stop() that call usb_kill_urb() to unlink all the urbs. Signed-off-by: NH Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: NIan Abbott <abbotti@mev.co.uk> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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