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[media] v4l2-ioctl: fix W=1 warnings

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Since the prt_names() macro is always called with an unsigned index the
((a) >= 0) condition is always true and gives a compiler warning when
compiling with W=1.
Rewrite the macro to avoid that warning, but cast the index to unsigned
just in case it is ever called with a signed argument.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2012-10-02 02:47:59 -03:00 committed by Mauro Carvalho Chehab
parent 1b8b10cc7e
commit d92462401d
1 changed files with 1 additions and 2 deletions
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drivers/media/v4l2-core/v4l2-ioctl.c
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@ -157,8 +157,7 @@ static const char *v4l2_memory_names[] = {
[V4L2_MEMORY_OVERLAY] = "overlay",
};
#define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
arr[a] : "unknown")
#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown")
/* ------------------------------------------------------------------ */
/* debug help functions */