From: Jingwen Chen <Jingwen.Chen2@xxxxxxx>
[ Upstream commit 64dcf2f01d59cf9fad19b1a387bd39736a8f4d69 ]
[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>
Reviewed-by: Monk Liu<monk.liu@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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 d0aea5e395315..e7678ba8fdcf8 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)
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);
}
--
2.27.0
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