This is a note to let you know that I've just added the patch titled
drm/amdgpu:fix random missing of FLR NOTIFY
to the 4.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amdgpu-fix-random-missing-of-flr-notify.patch
and it can be found in the queue-4.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Fri Mar 16 15:11:07 CET 2018
From: Monk Liu <Monk.Liu@xxxxxxx>
Date: Tue, 24 Oct 2017 15:10:11 +0800
Subject: drm/amdgpu:fix random missing of FLR NOTIFY
From: Monk Liu <Monk.Liu@xxxxxxx>
[ Upstream commit 34a4d2bf06b3ab92024b8e26d6049411369d1f1a ]
Signed-off-by: Monk Liu <Monk.Liu@xxxxxxx>
Acked-by: Christian König <christian.koenig@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
Patches currently in stable-queue which might be from Monk.Liu@xxxxxxx are
queue-4.15/drm-amdgpu-fix-random-missing-of-flr-notify.patch
queue-4.15/drm-amdgpu-fix-virtual-dce-bug.patch