Commit c686122c authored Sep 24, 2013 by Ville Syrjälä Committed by Daniel Vetter Oct 10, 2013

drm/i915: Don't underflow bestppm



We do 'bestppm - 10' in vlv_find_best_dpll() but never check whether
that might underflow. Add such a check.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

parent 69e4f900

drivers/gpu/drm/i915/intel_display.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -708,7 +708,7 @@ vlv_find_best_dpll(const intel_limit_t limit, struct drm_crtc crtc,
		bestppm = 0;
		flag = 1;
		}
		if (ppm < bestppm - 10) {
		if (bestppm >= 10 && ppm < bestppm - 10) {
		bestppm = ppm;
		flag = 1;
		}