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media: ccs: Avoid possible division by zero

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Calculating maximum M for scaler configuration involves dividing by
MIN_X_OUTPUT_SIZE limit register's value. Albeit the value is presumably
non-zero, the driver was missing the check it in fact was. Fix this.

Reported-by: Josh Poimboeuf <jpoimboe@kernel.org>
Closes: https://lore.kernel.org/all/ahukd6b3wonye3zgtptvwzvrxldcruazs2exfvll6etjhmcxyj@vq3eh6pd375b/
Fixes: ccfc97bdb5 ("[media] smiapp: Add driver")
Cc: stable@vger.kernel.org # for 5.15 and later
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Tested-by: Nathan Chancellor <nathan@kernel.org> # build
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
This commit is contained in:
Sakari Ailus 2025-11-25 00:24:48 +02:00 committed by Hans Verkuil
parent 37a5b80a94
commit 679f0b7b6a
1 changed files with 1 additions and 1 deletions
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2
drivers/media/i2c/ccs/ccs-core.c
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@ -2346,7 +2346,7 @@ static void ccs_set_compose_scaler(struct v4l2_subdev *subdev,
* CCS_LIM(sensor, SCALER_N_MIN) / sel->r.height;
max_m = crops[CCS_PAD_SINK]->width
* CCS_LIM(sensor, SCALER_N_MIN)
/ CCS_LIM(sensor, MIN_X_OUTPUT_SIZE);
/ (CCS_LIM(sensor, MIN_X_OUTPUT_SIZE) ?: 1);
a = clamp(a, CCS_LIM(sensor, SCALER_M_MIN),
CCS_LIM(sensor, SCALER_M_MAX));