From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 17 Jun 2020 18:50:02 +0000 (-0400)
Subject: drm/amdgpu/fence: fix ref count leak when pm_runtime_get_sync fails
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=e520d3e0d2818aafcdf9d8b60916754d8fedc366;p=linux.git

drm/amdgpu/fence: fix ref count leak when pm_runtime_get_sync fails

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: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Rajneesh Bhardwaj <rajneesh.bhardwaj@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
index 8537f47043485..60b323d7caf2d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fence.c
@@ -755,8 +755,10 @@ static int amdgpu_debugfs_gpu_recover(struct seq_file *m, void *data)
 	int r;
 
 	r = pm_runtime_get_sync(dev->dev);
-	if (r < 0)
+	if (r < 0) {
+		pm_runtime_put_autosuspend(dev->dev);
 		return 0;
+	}
 
 	seq_printf(m, "gpu recover\n");
 	amdgpu_device_gpu_recover(adev, NULL);