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media: v4l2-tpg: Clamp hue in tpg_s_hue() 

Setting `hue` by calling tpg_s_hue() directly is risky, since it does not
perform range check. Clamp `hue` to the valid range in tpg_s_hue().

Suggested-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Peilin Ye <yepeilin.cs@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Peilin Ye 2020-08-21 17:13:43 +02:00 committed by Mauro Carvalho Chehab
parent e3158a5e7e
commit 45c2044ccb
1 changed files with 1 additions and 0 deletions
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include/media/tpg/v4l2-tpg.h
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@ -325,6 +325,7 @@ static inline void tpg_s_saturation(struct tpg_data *tpg,
static inline void tpg_s_hue(struct tpg_data *tpg,
s16 hue)
{
hue = clamp_t(s16, hue, -128, 128);
if (tpg->hue == hue)
return;
tpg->hue = hue;