From 7dae2aaaf432767ca7aa11fa84643a7c2600dbdd Mon Sep 17 00:00:00 2001
From: Qiushi Wu <wu000273@umn.edu>
Date: Sun, 14 Jun 2020 04:56:05 +0200
Subject: [PATCH] media: ti-vpe: Fix a missing check and reference count leak
Git-commit: 7dae2aaaf432767ca7aa11fa84643a7c2600dbdd
Patch-mainline: v5.10-rc1
References: git-fixes
pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code, causing incorrect ref count if
pm_runtime_put_noidle() is not called in error handling paths.
And also, when the call of function vpe_runtime_get() failed,
we won't call vpe_runtime_put().
Thus call pm_runtime_put_noidle() if pm_runtime_get_sync() fails
inside vpe_runtime_get().
Fixes: 4571912743ac ("[media] v4l: ti-vpe: Add VPE mem to mem driver")
Signed-off-by: Qiushi Wu <wu000273@umn.edu>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/media/platform/ti-vpe/vpe.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
index 346f8212791c..779dd74b82d0 100644
--- a/drivers/media/platform/ti-vpe/vpe.c
+++ b/drivers/media/platform/ti-vpe/vpe.c
@@ -2475,6 +2475,8 @@ static int vpe_runtime_get(struct platform_device *pdev)
r = pm_runtime_get_sync(&pdev->dev);
WARN_ON(r < 0);
+ if (r)
+ pm_runtime_put_noidle(&pdev->dev);
return r < 0 ? r : 0;
}
--
2.16.4