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(parent: 01d4fb1) | patch
media: cec: avoid decrementing transmit_queue_sz if it is 0
authorHans Verkuil <hverkuil-cisco@xs4all.nl>
Sat, 7 Dec 2019 22:48:09 +0000 (23:48 +0100)
committerMauro Carvalho Chehab <mchehab+huawei@kernel.org>
Fri, 13 Dec 2019 08:02:39 +0000 (09:02 +0100)
commit4be77174c3fafc450527a0c383bb2034d2db6a2d
treed1dccdc7ffee7379ef9dead3adc2da39aa348c73tree | snapshot
parent01d4fb115470e9f88a58975fe157a9e8b214dfe5commit | diff
media: cec: avoid decrementing transmit_queue_sz if it is 0

WARN if transmit_queue_sz is 0 but do not decrement it.
The CEC adapter will become unresponsive if it goes below
0 since then it thinks there are 4 billion messages in the
queue.

Obviously this should not happen, but a driver bug could
cause this.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Cc: <stable@vger.kernel.org> # for v4.12 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
drivers/media/cec/cec-adap.c diff | blob | history
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