uas: new function to cancel data urbs
Add uas_unlink_data_urbs function to cancel in-flight data urbs. Moves existing code into a separate function. [ v2: also drop the locking, just call usb_unlink_urb no matter what, which is safe because the usb core guarantees the completion callback is called only once ] Signed-off-by: NGerd Hoffmann <kraxel@redhat.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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