[PATCH] drm/modes: Prevent division by zero htotal

Tina Zhang
2019-01-23T07:28:59Z

This patch prevents division by zero htotal.

Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Cc: Adam Jackson <ajax@redhat.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
---
drivers/gpu/drm/drm_modes.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index adce9a2..59b92b1 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -751,7 +751,7 @@ int drm_mode_hsync(const struct drm_display_mode *mode)
if (mode->hsync)
return mode->hsync;

- if (mode->htotal < 0)
+ if (mode->htotal <= 0)
return 0;

calc_val = (mode->clock * 1000) / mode->htotal; /* hsync in Hz */
--
2.7.4