[PATCH] drm/panfrost: fix ref count leak in panfrost_job_hw_submit

[Navid Emamdoost]

in panfrost_job_hw_submit, pm_runtime_get_sync is called which
increments the counter even in case of failure, leading to incorrect
ref count. In case of failure, decrement the ref count before returning.

Signed-off-by: Navid Emamdoost <navid.emamdo...@gmail.com>
---
 drivers/gpu/drm/panfrost/panfrost_job.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c 
b/drivers/gpu/drm/panfrost/panfrost_job.c
index 7914b1570841..89ac84667eb1 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.c
+++ b/drivers/gpu/drm/panfrost/panfrost_job.c
@@ -147,11 +147,10 @@ static void panfrost_job_hw_submit(struct panfrost_job 
*job, int js)
 
        ret = pm_runtime_get_sync(pfdev->dev);
        if (ret < 0)
-               return;
+               goto out;
 
        if (WARN_ON(job_read(pfdev, JS_COMMAND_NEXT(js)))) {
-               pm_runtime_put_sync_autosuspend(pfdev->dev);
-               return;
+               goto out;
        }
 
        cfg = panfrost_mmu_as_get(pfdev, &job->file_priv->mmu);
@@ -184,6 +183,9 @@ static void panfrost_job_hw_submit(struct panfrost_job 
*job, int js)
                                job, js, jc_head);
 
        job_write(pfdev, JS_COMMAND_NEXT(js), JS_COMMAND_START);
+out:
+       pm_runtime_put_sync_autosuspend(pfdev->dev);
+       return;
 }
 
 static void panfrost_acquire_object_fences(struct drm_gem_object **bos,
-- 
2.17.1