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drm: mode: Allow NULL modes for equality check

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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 <daniels@collabora.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Stone 2015-03-19 04:33:02 +00:00 committed by Daniel Vetter
parent f3af5c7ddd
commit 54270952e9
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/drm_modes.c
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@ -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) {