From: Monk Liu <Monk.Liu@amd.com>
Date: Tue, 24 Oct 2017 15:10:11 +0800
Subject: drm/amdgpu:fix random missing of FLR NOTIFY
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Git-commit: 34a4d2bf06b3ab92024b8e26d6049411369d1f1a
Patch-mainline: v4.16-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Signed-off-by: Monk Liu <Monk.Liu@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
+++ b/drivers/gpu/drm/amd/amdgpu/mxgpu_ai.c
@@ -282,9 +282,17 @@ static int xgpu_ai_mailbox_rcv_irq(struc
/* see what event we get */
r = xgpu_ai_mailbox_rcv_msg(adev, IDH_FLR_NOTIFICATION);
- /* only handle FLR_NOTIFY now */
- if (!r)
- schedule_work(&adev->virt.flr_work);
+ /* sometimes the interrupt is delayed to inject to VM, so under such case
+ * the IDH_FLR_NOTIFICATION is overwritten by VF FLR from GIM side, thus
+ * above recieve message could be failed, we should schedule the flr_work
+ * anyway
+ */
+ if (r) {
+ DRM_ERROR("FLR_NOTIFICATION is missed\n");
+ xgpu_ai_mailbox_send_ack(adev);
+ }
+
+ schedule_work(&adev->virt.flr_work);
}
return 0;