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[5.8,142/633] media: s5p-mfc: Fix a reference count leak

Message ID 20201027135529.346906817@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman Oct. 27, 2020, 1:48 p.m. UTC 
From: Qiushi Wu <wu000273@umn.edu>

[ Upstream commit 78741ce98c2e36188e2343434406b0e0bc50b0e7 ]

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: c5086f130a77 ("[media] s5p-mfc: Use clock gating only on MFC v5 hardware")
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/s5p-mfc/s5p_mfc_pm.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c b/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c
index 7d52431c2c837..62d2320a72186 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_pm.c
@@ -79,8 +79,10 @@  int s5p_mfc_power_on(void)
 	int i, ret = 0;
 
 	ret = pm_runtime_get_sync(pm->device);
-	if (ret < 0)
+	if (ret < 0) {
+		pm_runtime_put_noidle(pm->device);
 		return ret;
+	}
 
 	/* clock control */
 	for (i = 0; i < pm->num_clocks; i++) {