From b196cf7c016fefc8d4f9480ddd5217a00c2fb952 Mon Sep 17 00:00:00 2001
From: Felix Kuehling <Felix.Kuehling@amd.com>
Date: Wed, 4 Mar 2020 15:57:23 -0500
Subject: drm/amdkfd: Signal eviction fence on process destruction (v2)
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Git-commit: 129657c86f859e37cdfe48e97b00af89584aa62a
Patch-mainline: v5.7-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
Otherwise BOs may wait for the fence indefinitely and never be destroyed.
v2: Signal the fence right after destroying queues to avoid unnecessary
delaye-delete in kfd_process_wq_release
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: xinhui pan <xinhui.pan@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/amdkfd/kfd_process.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process.c b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
index 22abdbc6dfd7..c92285fbba8a 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_process.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_process.c
@@ -641,6 +641,11 @@ static void kfd_process_notifier_release(struct mmu_notifier *mn,
/* Indicate to other users that MM is no longer valid */
p->mm = NULL;
+ /* Signal the eviction fence after user mode queues are
+ * destroyed. This allows any BOs to be freed without
+ * triggering pointless evictions or waiting for fences.
+ */
+ dma_fence_signal(p->ef);
mutex_unlock(&p->mutex);
--
2.28.0