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media: tc358743: limit msg.len to CEC_MAX_MSG_SIZE 

I expect that the hardware will have limited this to 16, but just in
case it hasn't, check for this corner case.

Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Hans Verkuil 2022-08-24 09:00:24 +02:00 committed by Mauro Carvalho Chehab
parent 05c480f4d0
commit 3028fb90f5
1 changed files with 2 additions and 0 deletions
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2
drivers/media/i2c/tc358743.c
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@ -964,6 +964,8 @@ static void tc358743_cec_handler(struct v4l2_subdev *sd, u16 intstatus,
v = i2c_rd32(sd, CECRCTR);
msg.len = v & 0x1f;
if (msg.len > CEC_MAX_MSG_SIZE)
msg.len = CEC_MAX_MSG_SIZE;
for (i = 0; i < msg.len; i++) {
v = i2c_rd32(sd, CECRBUF1 + i * 4);
msg.msg[i] = v & 0xff;