[PATCH] media: camss: csid: Fix runtime PM imbalance in csid_set_power

[Dinghao Liu]

pm_runtime_get_sync() increments the runtime PM usage counter even
when it returns an error code. Thus a pairing decrement is needed on
the error handling path to keep the counter balanced.

Signed-off-by: Dinghao Liu <dinghao....@zju.edu.cn>
---
 drivers/media/platform/qcom/camss/camss-csid.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/camss/camss-csid.c 
b/drivers/media/platform/qcom/camss/camss-csid.c
index a5ae85674ffb..8a247b6f5550 100644
--- a/drivers/media/platform/qcom/camss/camss-csid.c
+++ b/drivers/media/platform/qcom/camss/camss-csid.c
@@ -562,8 +562,10 @@ static int csid_set_power(struct v4l2_subdev *sd, int on)
                u32 hw_version;
 
                ret = pm_runtime_get_sync(dev);
-               if (ret < 0)
+               if (ret < 0) {
+                       pm_runtime_put_sync(dev);
                        return ret;
+               }
 
                ret = regulator_enable(csid->vdda);
                if (ret < 0) {
-- 
2.17.1