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drm/amd/amdgpu: add error handling to amdgpu_virt_read_pf2vf_data

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[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@amd.com>
Reviewed-by: Monk Liu<monk.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jingwen Chen 2021-01-19 16:54:50 +08:00 committed by Alex Deucher
parent 9024fb0815
commit 64dcf2f01d
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/amd/amdgpu/amdgpu_virt.c
View file

@ -560,10 +560,14 @@ 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);
}