On Sun, Feb 09, 2020 at 12:47:16PM +0100, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
The patch below does not apply to the 5.5-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 4be77174c3fafc450527a0c383bb2034d2db6a2d Mon Sep 17 00:00:00 2001
From: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>
Date: Sat, 7 Dec 2019 23:48:09 +0100
Subject: [PATCH] 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@xxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # for v4.12 and up
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Another duplicate commit:
4be77174c3fa ("media: cec: avoid decrementing transmit_queue_sz if it is 0")
95c29d46ab2a ("media: cec: avoid decrementing transmit_queue_sz if it is 0")
--
Thanks,
Sasha
