drm/msm: Handle drm_atomic_helper_swap_state failure
authorMaarten Lankhorst <maarten.lankhorst@linux.intel.com>
Tue, 11 Jul 2017 14:33:09 +0000 (16:33 +0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Wed, 26 Jul 2017 11:22:42 +0000 (13:22 +0200)
commit771f14c5ccfb2b106e04110a2b250c46bb6b06df
tree2cc0960b930f324755a65df374cd8dba9d6065a8
parent76cc07189da7778d265cf3219d66781dd7d4c33b
drm/msm: 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.

MSM has its own busy tracking, which means the swap_state call can be
done with stall = false, in which case it should never return an error.
Handle failure with BUG_ON for this reason.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Rob Clark <robdclark@gmail.com>
Cc: linux-arm-msm@vger.kernel.org
Cc: freedreno@lists.freedesktop.org
Link: http://patchwork.freedesktop.org/patch/msgid/20170711143314.2148-8-maarten.lankhorst@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Tested-by: Archit Taneja <architt@codeaurora.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/msm/msm_atomic.c