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media: exynos4-is: Prevent NULL pointer dereference in __isp_video_try_fmt()

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This patch fixes potential NULL pointer dereference as indicated
by the following static checker warning:

drivers/media/platform/exynos4-is/fimc-isp-video.c:408 isp_video_try_fmt_mplane()
error: NULL dereference inside function '__isp_video_try_fmt(isp, &f->fmt.pix_mp, (0))()'.

Fixes: 34947b8aeb: ("[media] exynos4-is: Add the FIMC-IS ISP capture DMA driver")

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Sylwester Nawrocki 2018-05-15 05:21:45 -04:00 committed by Mauro Carvalho Chehab
parent 666e994aa2
commit 7c1b9a5aee
1 changed files with 8 additions and 3 deletions
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11
drivers/media/platform/exynos4-is/fimc-isp-video.c
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@ -384,12 +384,17 @@ static void __isp_video_try_fmt(struct fimc_isp *isp,
struct v4l2_pix_format_mplane *pixm,
const struct fimc_fmt **fmt)
{
*fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, 2);
const struct fimc_fmt *__fmt;
__fmt = fimc_isp_find_format(&pixm->pixelformat, NULL, 2);
if (fmt)
*fmt = __fmt;
pixm->colorspace = V4L2_COLORSPACE_SRGB;
pixm->field = V4L2_FIELD_NONE;
pixm->num_planes = (*fmt)->memplanes;
pixm->pixelformat = (*fmt)->fourcc;
pixm->num_planes = __fmt->memplanes;
pixm->pixelformat = __fmt->fourcc;
/*
* TODO: double check with the docmentation these width/height
* constraints are correct.