From 54270952e9a83aebf31d16ded28e6757fdf8c88b Mon Sep 17 00:00:00 2001 From: Daniel Stone Date: Thu, 19 Mar 2015 04:33:02 +0000 Subject: [PATCH] drm: mode: Allow NULL modes for equality check Since we're now using mode == NULL to represent disabled, it's not wholly surprising that we'd want to compare NULL modes. Signed-off-by: Daniel Stone Signed-off-by: Daniel Vetter --- drivers/gpu/drm/drm_modes.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 5388596..213b11e 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -903,6 +903,12 @@ EXPORT_SYMBOL(drm_mode_duplicate); */ bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2) { + if (!mode1 && !mode2) + return true; + + if (!mode1 || !mode2) + return false; + /* do clock check convert to PICOS so fb modes get matched * the same */ if (mode1->clock && mode2->clock) { -- 2.7.4