tree ed22c75a3aef8b6d9c2121ff66e724d8b5f052f0
parent 607b3a4d5f258226856278cbdbb6e804effb27d6
author Jayakrishnan Memana <jayakrishnan.memana@maxim-ic.com> 1342360443 -0300
committer chrmhoffmann <chrmhoffmann@gmail.com> 1586074562 +0200

uvcvideo: Reset the bytesused field when recycling an erroneous buffer

commit 8a3f0ede2b3f5477122060af1a816c6bbf09fcd2 upstream.

Buffers marked as erroneous are recycled immediately by the driver if
the nodrop module parameter isn't set. The buffer payload size is reset
to 0, but the buffer bytesused field isn't. This results in the buffer
being immediately considered as complete, leading to an infinite loop in
interrupt context.

Fix the problem by resetting the bytesused field when recycling the
buffer.

Signed-off-by: Jayakrishnan Memana <jayakrishnan.memana@maxim-ic.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>