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From fe92a893038b135e92ad152b1a6ea9971c3ea156 Mon Sep 17 00:00:00 2001
From: Oak Zeng <Oak.Zeng@amd.com>
Date: Fri, 26 Jan 2018 13:56:24 -0500
Subject: [PATCH 3310/4131] drm/amdgpu: Ignore TLB flush before vmid allocate
Change-Id: I7309e111ebf46b73e9986187887c13642143b486
Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 7bddeb6..6e3043c 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -1183,7 +1183,13 @@ void kfd_flush_tlb(struct kfd_dev *dev, struct kfd_process *p)
return;
}
- f2g->invalidate_tlbs_vmid(dev->kgd, pdd->qpd.vmid);
+ /* vmid allocation is delayed to the creation of the first
+ * queue of the process. For buffers allocated and mapped
+ * before queue creation, vmid is still no allocated (valued 0).
+ * Ignore tlb invalidation request for this case.
+ */
+ if (pdd->qpd.vmid)
+ f2g->invalidate_tlbs_vmid(dev->kgd, pdd->qpd.vmid);
} else
f2g->invalidate_tlbs(dev->kgd, p->pasid);
}
--
2.7.4
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