[PATCH 1/6] drm/amdgpu: grab an additional reference on the gang fence

[Christian König]

We keep the gang submission fence around in adev, make sure that it
stays alive.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index d6b473217c8b..aaa8f9f7b6b2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -6753,6 +6753,7 @@ struct dma_fence *amdgpu_device_switch_gang(struct amdgpu_device *adev,
 {
 	struct dma_fence *old = NULL;
 
+	dma_fence_get(gang);
 	do {
 		dma_fence_put(old);
 		old = amdgpu_device_get_gang(adev);
@@ -6765,6 +6766,7 @@ struct dma_fence *amdgpu_device_switch_gang(struct amdgpu_device *adev,
 	} while (cmpxchg((struct dma_fence __force **)&adev->gang_submit,
 			 old, gang) != old);
 
+	dma_fence_put(old);
 	dma_fence_put(old);
 	return NULL;
 }
-- 
2.34.1