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drm/amdgpu: Set no_hw_access when VF request full GPU fails

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[ Upstream commit 33f23fc315 ]

[Why]
If VF request full GPU access and the request failed,
the VF driver can get stuck accessing registers for an extended period during
the unload of KMS.

[How]
Set no_hw_access flag when VF request for full GPU access fails
This prevents further hardware access attempts, avoiding the prolonged
stuck state.

Signed-off-by: Yifan Zha <Yifan.Zha@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yifan Zha 2024-06-27 15:06:23 +08:00 committed by Greg Kroah-Hartman
parent 030958c2d0
commit 077c7e5fee
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
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@ -137,8 +137,10 @@ int amdgpu_virt_request_full_gpu(struct amdgpu_device *adev, bool init)
if (virt->ops && virt->ops->req_full_gpu) { if (virt->ops && virt->ops->req_full_gpu) {
r = virt->ops->req_full_gpu(adev, init); r = virt->ops->req_full_gpu(adev, init);
if (r) if (r) {
adev->no_hw_access = true;
return r; return r;
}
adev->virt.caps &= ~AMDGPU_SRIOV_CAPS_RUNTIME; adev->virt.caps &= ~AMDGPU_SRIOV_CAPS_RUNTIME;
} }