drm/amdgpu: fix missing dma_fence_put in error path

When the fence can't be added we need to drop the reference.

Suggested-by: Bert Karwatzki <[email protected]>
Signed-off-by: Christian König <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Reviewed-by: Alex Deucher <[email protected]>
Reviewed-by: Luben Tuikov <[email protected]>

Author: ChristianKoenigAMD

drivers/gpu/drm/amd/amdgpu/amdgpu_sync.c

@@ -391,8 +391,10 @@ int amdgpu_sync_push_to_job(struct amdgpu_sync *sync, struct amdgpu_job *job)
 
 		dma_fence_get(f);
 		r = drm_sched_job_add_dependency(&job->base, f);
-		if (r)
+		if (r) {
+			dma_fence_put(f);
 			return r;
+		}
 	}
 	return 0;
 }