media: venus: core: Fix runtime PM imbalance in venus_probe

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. For other error
paths after this call, things are the same.

Fix this by adding pm_runtime_put_noidle() after 'err_runtime_disable'
label. But in this case, the error path after pm_runtime_put_sync()
will decrease PM usage counter twice. Thus add an extra
pm_runtime_get_noresume() in this path to balance PM counter.

Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

diff --git a/drivers/media/platform/qcom/venus/core.c b/drivers/media/platform/qcom/venus/core.c
index 203c653..b0b932b 100644 (file)
--- a/drivers/media/platform/qcom/venus/core.c
+++ b/drivers/media/platform/qcom/venus/core.c
@@ -287,8 +287,10 @@ static int venus_probe(struct platform_device *pdev)
                goto err_core_deinit;
 
        ret = pm_runtime_put_sync(dev);
-       if (ret)
+       if (ret) {
+               pm_runtime_get_noresume(dev);
                goto err_dev_unregister;
+       }
 
        return 0;
 
@@ -299,6 +301,7 @@ err_core_deinit:
 err_venus_shutdown:
        venus_shutdown(core);
 err_runtime_disable:
+       pm_runtime_put_noidle(dev);
        pm_runtime_set_suspended(dev);
        pm_runtime_disable(dev);
        hfi_destroy(core);