From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 17 Jun 2020 18:52:07 +0000 (-0400)
Subject: drm/amdkfd: fix ref count leak when pm_runtime_get_sync fails
X-Git-Tag: v5.8.6~224
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=4e302836dc790a64fc4e9136db63c72a9cde252d;p=thirdparty%2Fkernel%2Fstable.git

drm/amdkfd: fix ref count leak when pm_runtime_get_sync fails

[ Upstream commit 1c1ada37af6ee6fb9cfc8da6a56cc83208cd8d6f ]

The call to pm_runtime_get_sync increments the counter even in case of
failure, leading to incorrect ref count.
In case of failure, decrement the ref count before returning.

Reviewed-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 0e0c42e9f6a31..6520a920cad4a 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -1003,8 +1003,10 @@ struct kfd_process_device *kfd_bind_process_to_device(struct kfd_dev *dev,
 	 */
 	if (!pdd->runtime_inuse) {
 		err = pm_runtime_get_sync(dev->ddev->dev);
-		if (err < 0)
+		if (err < 0) {
+			pm_runtime_put_autosuspend(dev->ddev->dev);
 			return ERR_PTR(err);
+		}
 	}
 
 	err = kfd_iommu_bind_process_to_device(pdd);