[AMD Official Use Only - Approved for External Use]
Reviewed-by: Monk Liu<monk.liu@xxxxxxx>
Thanks
------------------------------------------
Monk Liu | Cloud-GPU Core team
------------------------------------------
-----Original Message-----
From: Chen, JingWen <JingWen.Chen2@xxxxxxx>
Sent: Thursday, January 21, 2021 11:13 AM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx; Liu, Monk <Monk.Liu@xxxxxxx>
Cc: Chen, JingWen <JingWen.Chen2@xxxxxxx>
Subject: RE: [PATCH] drm/amd/amdgpu: add error handling to amdgpu_virt_read_pf2vf_data
[AMD Official Use Only - Approved for External Use]
Ping
Best Regards,
JingWen Chen
-----Original Message-----
From: Jingwen Chen <Jingwen.Chen2@xxxxxxx>
Sent: Tuesday, January 19, 2021 5:07 PM
To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
Cc: Chen, JingWen <JingWen.Chen2@xxxxxxx>; Chen, JingWen <JingWen.Chen2@xxxxxxx>
Subject: [PATCH] drm/amd/amdgpu: add error handling to amdgpu_virt_read_pf2vf_data
[Why]
when vram lost happened in guest, try to write vram can lead to kernel stuck.
[How]
When the readback data is invalid, don't do write work, directly reschedule a new work.
Signed-off-by: Jingwen Chen <Jingwen.Chen2@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
index c649944e49da..3dd7eec52344 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
@@ -558,10 +558,14 @@ static int amdgpu_virt_write_vf2pf_data(struct amdgpu_device *adev) static void amdgpu_virt_update_vf2pf_work_item(struct work_struct *work) {
struct amdgpu_device *adev = container_of(work, struct amdgpu_device, virt.vf2pf_work.work);
+ int ret;
- amdgpu_virt_read_pf2vf_data(adev);
+ ret = amdgpu_virt_read_pf2vf_data(adev);
+ if (ret)
+ goto out;
amdgpu_virt_write_vf2pf_data(adev);
+out:
schedule_delayed_work(&(adev->virt.vf2pf_work), adev->virt.vf2pf_update_interval_ms);
}
--
2.25.1
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