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drm: Warn about negative sizes when calculating scale factor

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Passing negative width/hight to scale factor calculations is not
legal. Let's WARN if that happens.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1469549224-1860-2-git-send-email-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä 2016-07-26 19:06:56 +03:00 committed by Sean Paul
parent 31ad61e4af
commit 1e1a5f8f8c
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_rect.c
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@ -100,7 +100,7 @@ static int drm_calc_scale(int src, int dst)
{
int scale = 0;
if (src < 0 || dst < 0)
if (WARN_ON(src < 0 || dst < 0))
return -EINVAL;
if (dst == 0)