drm/vc4: Handle drm_atomic_helper_swap_state failure
authorMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Tue, 11 Jul 2017 14:33:12 +0000 (16:33 +0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Wed, 26 Jul 2017 11:22:43 +0000 (13:22 +0200)
commitd68bc0e75a7194a3d7e738705a7d54e66a06d75f
tree61add19a79f330c01d1d9e691066c663c82b07a2
parentfad9e43a331c46d5e011c415117ee7b949454a86
drm/vc4: Handle drm_atomic_helper_swap_state failure

drm_atomic_helper_swap_state() will be changed to interruptible waiting
in the next few commits, so all drivers have to be changed to handling
failure.

VC4 has its own nonblocking modeset tracking through the vc4->async_modeset
semaphore, so it doesn't need to stall in swap_state. Pass stall = false
and BUG_ON when it returns an error. This should never happen for !stall.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Eric Anholt <eric@anholt.net>
Link: http://patchwork.freedesktop.org/patch/msgid/20170711143314.2148-11-maarten.lankhorst@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/vc4/vc4_kms.c