[Public]
Acked-by: Alex Deucher
From: Yifan Zha
Sent: Friday, June 28, 2024 4:42 AM
To: amd-gfx@lists.freedesktop.org ; Deucher,
Alexander ; Zhang, Hawking
Cc: Chen, Horace ; Chang, HaiJun ;
Zha, YiFan(Even)
Subject: [PATCH] drm/amdgpu: Set no_hw_access when VF request full GPU fails
[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
---
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index ccb3d041c2b2..111c380f929b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -86,8 +86,10 @@ int amdgpu_virt_request_full_gpu(struct amdgpu_device *adev,
bool init)
if (virt->ops && virt->ops->req_full_gpu) {
r = virt->ops->req_full_gpu(adev, init);
- if (r)
+ if (r) {
+ adev->no_hw_access = true;
return r;
+ }
adev->virt.caps &= ~AMDGPU_SRIOV_CAPS_RUNTIME;
}
--
2.25.1
