[PATCH 6.18 392/752] drm/amdgpu: avoid sdma ring reset in sriov

Sasha Levin
2026-02-28T17:53:36Z

From: Victor Zhao <Victor.Zhao@amd.com>

[ Upstream commit 5cc7bbd9f1b74d9fe2f7ac08d6ba0477e8d2d65f ]

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>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
index 8b8a04138711c..321310ba2c08e 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_sdma.c
+++ b/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) {
--
2.51.0