[PATCH] drm/vc4: Fix PM reference leak in vc4_vec_encoder_enable()

[Bixuan Cui]

The pm_runtime_get_sync will increment pm usage counter even it failed.Thus a
pairing decrement is needed.
Change pm_runtime_get_sync to pm_runtime_resume_and_get for keeping usage counter
balanced.

Reported-by: Hulk Robot <hulkci at huawei.com>
Signed-off-by: Bixuan Cui <cuibixuan at huawei.com>
---
 drivers/gpu/drm/vc4/vc4_vec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/vc4/vc4_vec.c b/drivers/gpu/drm/vc4/vc4_vec.c
index bd5b8eb58b18..924e03050dd4 100644
--- a/drivers/gpu/drm/vc4/vc4_vec.c
+++ b/drivers/gpu/drm/vc4/vc4_vec.c
@@ -403,7 +403,7 @@ static void vc4_vec_encoder_enable(struct drm_encoder *encoder)
 	struct vc4_vec *vec = vc4_vec_encoder->vec;
 	int ret;
 
-	ret = pm_runtime_get_sync(&vec->pdev->dev);
+	ret = pm_runtime_resume_and_get(&vec->pdev->dev);
 	if (ret < 0) {
 		DRM_ERROR("Failed to retain power domain: %d\n", ret);
 		return;