drm/amdgpu: avoid sdma ring reset in sriov

[ Upstream commit 5cc7bbd ]

sdma ring reset is not supported in SRIOV. kfd driver does not check
reset mask, and could queue sdma ring reset during unmap_queues_cpsch.

Avoid the ring reset for sriov.

Signed-off-by: Victor Zhao <Victor.Zhao@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: Victor Zhao

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

@@ -558,6 +558,9 @@ int amdgpu_sdma_reset_engine(struct amdgpu_device *adev, uint32_t instance_id,
 	struct amdgpu_ring *gfx_ring = &sdma_instance->ring;
 	struct amdgpu_ring *page_ring = &sdma_instance->page;
 
+	if (amdgpu_sriov_vf(adev))
+		return -EOPNOTSUPP;
+
 	mutex_lock(&sdma_instance->engine_reset_mutex);
 
 	if (!caller_handles_kernel_queues) {