drm/atomic: fix null pointer access to mode_fixup callback
authorInki Dae <inki.dae@samsung.com>
Tue, 11 Aug 2015 12:23:49 +0000 (21:23 +0900)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Tue, 11 Aug 2015 15:20:30 +0000 (17:20 +0200)
commit845249172a363c2217af5926fac17f58c7228aa4
treec9b6f969af7eb7a024cd028f95ea1c8970d9b595
parent0695726e85b45f3298f64fa4cee89f40f923fb8c
drm/atomic: fix null pointer access to mode_fixup callback

This patch fixes null pointer access incurred when
encoder driver didn't set its own mode_fixup callback.

mode_fixup callback shoudn't be called if the callback
of drm_encoder_helper_funcs is NULL.

Changelog v2:
- change it to else if

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/drm_atomic_helper.c