[PATCH] v4l: soc_camera: fix bound checking of mbus_fmt[] index

[Baruch Siach]

When code <= V4L2_MBUS_FMT_FIXED soc_mbus_get_fmtdesc returns a pointer to
mbus_fmt[x], where x < 0. Fix this.

Signed-off-by: Baruch Siach <bar...@tkos.co.il>
---
 drivers/media/video/soc_mediabus.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/media/video/soc_mediabus.c 
b/drivers/media/video/soc_mediabus.c
index f8d5c87..a2808e2 100644
--- a/drivers/media/video/soc_mediabus.c
+++ b/drivers/media/video/soc_mediabus.c
@@ -136,6 +136,8 @@ const struct soc_mbus_pixelfmt *soc_mbus_get_fmtdesc(
 {
        if ((unsigned int)(code - V4L2_MBUS_FMT_FIXED) > ARRAY_SIZE(mbus_fmt))
                return NULL;
+       if ((unsigned int)code <= V4L2_MBUS_FMT_FIXED)
+               return NULL;
        return mbus_fmt + code - V4L2_MBUS_FMT_FIXED - 1;
 }
 EXPORT_SYMBOL(soc_mbus_get_fmtdesc);
-- 
1.6.6.1

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