[PATCH 4.14 037/191] media: platform: fcp: Fix a reference count leak.

Greg Kroah-Hartman
2020-10-27T18:18:41Z

From: Qiushi Wu <wu000273@umn.edu>

[ Upstream commit 63e36a381d92a9cded97e90d481ee22566557dd1 ]

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.
Thus call pm_runtime_put_noidle() if pm_runtime_get_sync() fails.

Fixes: 6eaafbdb668b ("[media] v4l: rcar-fcp: Keep the coding style consistent")
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>
---
drivers/media/platform/rcar-fcp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/rcar-fcp.c b/drivers/media/platform/rcar-fcp.c
index 0047d144c9326..19502a1860cf5 100644
--- a/drivers/media/platform/rcar-fcp.c
+++ b/drivers/media/platform/rcar-fcp.c
@@ -106,8 +106,10 @@ int rcar_fcp_enable(struct rcar_fcp_device *fcp)
return 0;

ret = pm_runtime_get_sync(fcp->dev);
- if (ret < 0)
+ if (ret < 0) {
+ pm_runtime_put_noidle(fcp->dev);
return ret;
+ }

return 0;
}
--
2.25.1