media: ti-vpe: Fix a missing check and reference count leak

[ Upstream commit 7dae2aaaf432767ca7aa11fa84643a7c2600dbdd ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/media/platform/ti-vpe/vpe.c b/drivers/media/platform/ti-vpe/vpe.c
index 2e8970c7e22da42f1c147ab75a5e4dc3e97c8b4e..bbd8bb611915c9b51c0572d92f5d9f5aecb95a3e 100644 (file)
--- a/drivers/media/platform/ti-vpe/vpe.c
+++ b/drivers/media/platform/ti-vpe/vpe.c
@@ -2470,6 +2470,8 @@ 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;
 }