Acked-by: Alyssa Rosenzweig alyssa.rosenzweig@collabora.com

On Sun, Jun 14, 2020 at 01:36:19AM -0500, Navid Emamdoost wrote:

in panfrost_perfcnt_enable_locked, 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.emamdoost@gmail.com

drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c index 6913578d5aa7..92c64b20eb29 100644 --- a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c +++ b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c @@ -83,11 +83,13 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev,

ret = pm_runtime_get_sync(pfdev->dev); if (ret < 0)

• return ret;
  

• goto err_put_pm;
  
  

  bo = drm_gem_shmem_create(pfdev->ddev, perfcnt->bosize);

• if (IS_ERR(bo))

• return PTR_ERR(bo);
  

• if (IS_ERR(bo)) {

• ret = PTR_ERR(bo);
  

• goto err_put_pm;
  

• }

  /* Map the perfcnt buf in the address space attached to file_priv. */ ret = panfrost_gem_open(&bo->base, file_priv);

@@ -168,6 +170,8 @@ static int panfrost_perfcnt_enable_locked(struct panfrost_device *pfdev, panfrost_gem_close(&bo->base, file_priv); err_put_bo: drm_gem_object_put_unlocked(&bo->base); +err_put_pm:

• pm_runtime_put(pfdev->dev); return ret;

}

-- 2.17.1