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media: camss: Fix a reference count leak.

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[ Upstream commit d0675b67b4 ]

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 is not called in error handling paths.
Thus call pm_runtime_put_sync() if pm_runtime_get_sync() fails.

Fixes: 02afa816db ("media: camss: Add basic runtime PM support")
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Qiushi Wu
2020-06-14 01:27:12 +02:00
committed by Greg Kroah-Hartman
parent 28b21e02dc
commit 0747ff17aa
1 changed files with 3 additions and 1 deletions
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4
drivers/media/platform/qcom/camss/camss-csiphy.c
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@@ -176,8 +176,10 @@ static int csiphy_set_power(struct v4l2_subdev *sd, int on)
int ret;
ret = pm_runtime_get_sync(dev);
if (ret < 0)
if (ret < 0) {
pm_runtime_put_sync(dev);
return ret;
}
ret = csiphy_set_clock_rates(csiphy);
if (ret < 0) {