[PATCH 5/5] drm/amdgpu/sdma: In legacy queue reset function, check if KFD is initialized

["Timur Kristóf" <timur.kristof@gmail.com>]

Avoid calling amdgpu_amdkfd_suspend() and amdgpu_amdkfd_resume()
when the KFD device is not initialized.

This allows the function to be used on GPUs where KFD is
not supported or the support is hidden behind an experimental
flag, such as CIK, in the future.

Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
index 9eebd8380834..8798caed1ff1 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
@@ -664,9 +664,14 @@ int amdgpu_sdma_reset_queue_legacy(struct amdgpu_ring *ring,
 
 	amdgpu_ring_reset_helper_begin(ring, timedout_fence);
 
-	amdgpu_amdkfd_suspend(adev, true);
+	if (adev->kfd.dev)
+		amdgpu_amdkfd_suspend(adev, true);
+
 	r = amdgpu_sdma_reset_engine(adev, ring->me, true);
-	amdgpu_amdkfd_resume(adev, true);
+
+	if (adev->kfd.dev)
+		amdgpu_amdkfd_resume(adev, true);
+
 	if (r)
 		return r;
 
-- 
2.55.0