[PATCH] [v2] media: vsp1: Fix runtime PM imbalance on error

[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>
---

Changelog:

v2: - Fix the imbalance in vsp1_device_get().
      Use vsp1_device_get() and vsp1_device_put()
      to replace pm_runtime_get_sync() and
      pm_runtime_put_sync() in vsp1_probe().
---
 drivers/media/platform/vsp1/vsp1_drv.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/vsp1/vsp1_drv.c 
b/drivers/media/platform/vsp1/vsp1_drv.c
index c650e45bb0ad..dc62533cf32c 100644
--- a/drivers/media/platform/vsp1/vsp1_drv.c
+++ b/drivers/media/platform/vsp1/vsp1_drv.c
@@ -562,7 +562,12 @@ int vsp1_device_get(struct vsp1_device *vsp1)
        int ret;
 
        ret = pm_runtime_get_sync(vsp1->dev);
-       return ret < 0 ? ret : 0;
+       if (ret < 0) {
+               pm_runtime_put_noidle(vsp1->dev);
+               return ret;
+       }
+
+       return 0;
 }
 
 /*
@@ -845,12 +850,12 @@ static int vsp1_probe(struct platform_device *pdev)
        /* Configure device parameters based on the version register. */
        pm_runtime_enable(&pdev->dev);
 
-       ret = pm_runtime_get_sync(&pdev->dev);
+       ret = vsp1_device_get(vsp1);
        if (ret < 0)
                goto done;
 
        vsp1->version = vsp1_read(vsp1, VI6_IP_VERSION);
-       pm_runtime_put_sync(&pdev->dev);
+       vsp1_device_put(vsp1);
 
        for (i = 0; i < ARRAY_SIZE(vsp1_device_infos); ++i) {
                if ((vsp1->version & VI6_IP_VERSION_MODEL_MASK) ==
-- 
2.17.1