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[media] s5p-fimc: Avoid possible NULL pointer dereference in set_fmt op

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This fixes following issue found with a static analysis tool:
Pointer 'ffmt' returned from call to function 'fimc_capture_try_format'
at line 1522 may be NULL and may be dereferenced at line 1535.
Although it shouldn't happen in practice, add the NULL pointer check
to be on the safe side.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sylwester Nawrocki 2012-12-05 13:52:00 -03:00 committed by Mauro Carvalho Chehab
parent ff4e3fe86f
commit 6612545ffb
1 changed files with 4 additions and 0 deletions
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4
drivers/media/platform/s5p-fimc/fimc-capture.c
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@ -1561,6 +1561,10 @@ static int fimc_subdev_set_fmt(struct v4l2_subdev *sd,
*mf = fmt->format;
return 0;
}
/* There must be a bug in the driver if this happens */
if (WARN_ON(ffmt == NULL))
return -EINVAL;
/* Update RGB Alpha control state and value range */
fimc_alpha_ctrl_update(ctx);