From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Date: Tue, 11 Jul 2017 16:33:08 +0200
Subject: drm/mediatek: Handle drm_atomic_helper_swap_state failure
Git-commit: 76cc07189da7778d265cf3219d66781dd7d4c33b
Patch-mainline: v4.14-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
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.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: CK Hu <ck.hu@mediatek.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mediatek@lists.infradead.org
Link: http://patchwork.freedesktop.org/patch/msgid/20170711143314.2148-7-maarten.lankhorst@linux.intel.com
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -109,7 +109,12 @@ static int mtk_atomic_commit(struct drm_
mutex_lock(&private->commit.lock);
flush_work(&private->commit.work);
- drm_atomic_helper_swap_state(state, true);
+ ret = drm_atomic_helper_swap_state(state, true);
+ if (ret) {
+ mutex_unlock(&private->commit.lock);
+ drm_atomic_helper_cleanup_planes(drm, state);
+ return ret;
+ }
drm_atomic_state_get(state);
if (async)