media: exynos4-is: Fix a reference count leak
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Message ID 20200614030111.28843-1-wu000273@umn.edu
State Not Applicable
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  • media: exynos4-is: Fix a reference count leak
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Commit Message

wu000273@umn.edu June 14, 2020, 3:01 a.m. UTC
From: Qiushi Wu <wu000273@umn.edu>

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.

Signed-off-by: Qiushi Wu <wu000273@umn.edu>
---
 drivers/media/platform/exynos4-is/mipi-csis.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Patch
diff mbox series

diff --git a/drivers/media/platform/exynos4-is/mipi-csis.c b/drivers/media/platform/exynos4-is/mipi-csis.c
index 540151bbf58f..1aac167abb17 100644
--- a/drivers/media/platform/exynos4-is/mipi-csis.c
+++ b/drivers/media/platform/exynos4-is/mipi-csis.c
@@ -510,8 +510,10 @@  static int s5pcsis_s_stream(struct v4l2_subdev *sd, int enable)
 	if (enable) {
 		s5pcsis_clear_counters(state);
 		ret = pm_runtime_get_sync(&state->pdev->dev);
-		if (ret && ret != 1)
+		if (ret && ret != 1) {
+			pm_runtime_put_noidle(&state->pdev->dev);
 			return ret;
+		}
 	}
 
 	mutex_lock(&state->lock);