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Commit 24be4e46 authored by Imre Deak's avatar Imre Deak Committed by Daniel Vetter
Browse files

drm/i915: check for div-by-zero in vlv_PLL_is_optimal 



Signed-off-by: default avatarImre Deak <imre.deak@intel.com>
Reviewed-by: default avatarJesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent d5dd62bd

drivers/gpu/drm/i915/intel_display.c

+3 −0
Original line number Diff line number Diff line
@@ -786,6 +786,9 @@ static bool vlv_PLL_is_optimal(struct drm_device *dev, int target_freq, 
			       unsigned int best_error_ppm,

			       unsigned int *error_ppm)

{

	if (WARN_ON_ONCE(!target_freq))

		return false;



	*error_ppm = div_u64(1000000ULL *

				abs(target_freq - calculated_clock->dot),

			     target_freq);