[PATCH 5.4 45/72] drm/mediatek: Add exception handing in mtk_drm_probe() if component init fail

[Greg Kroah-Hartman]

From: Yu Kuai <yuku...@huawei.com>

[ Upstream commit 64c194c00789889b0f9454f583712f079ba414ee ]

mtk_ddp_comp_init() is called in a loop in mtk_drm_probe(), if it
fail, previous successive init component is not proccessed.

Thus uninitialize valid component and put their device if component
init failed.

Fixes: 119f5173628a ("drm/mediatek: Add DRM Driver for Mediatek SoC MT8173.")
Signed-off-by: Yu Kuai <yuku...@huawei.com>
Signed-off-by: Chun-Kuang Hu <chunkuang...@kernel.org>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 drivers/gpu/drm/mediatek/mtk_drm_drv.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c 
b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 352b81a7a6702..f98bb2e263723 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -594,8 +594,13 @@ err_pm:
        pm_runtime_disable(dev);
 err_node:
        of_node_put(private->mutex_node);
-       for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
+       for (i = 0; i < DDP_COMPONENT_ID_MAX; i++) {
                of_node_put(private->comp_node[i]);
+               if (private->ddp_comp[i]) {
+                       put_device(private->ddp_comp[i]->larb_dev);
+                       private->ddp_comp[i] = NULL;
+               }
+       }
        return ret;
 }
 
-- 
2.25.1