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.comReviewed-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>
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