6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Xiaogang Chen <xiaogang.chen@xxxxxxx>
[ Upstream commit f326d7cc745683f53052b84382bd10567b45cd5d ]
This reverts commit 8a774fe912ff ("drm/amdgpu: avoid restore process run into dead loop")
since buffer got pinned is not related whether it needs mapping
And skip buffer validation at kfd driver if the buffer has been pinned.
Signed-off-by: Xiaogang Chen <Xiaogang.Chen@xxxxxxx>
Reviewed-by: Felix Kuehling <felix.kuehling@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
index 9d72bb0a0eae..a1f35510d539 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gpuvm.c
@@ -407,6 +407,10 @@ static int amdgpu_amdkfd_bo_validate(struct amdgpu_bo *bo, uint32_t domain,
"Called with userptr BO"))
return -EINVAL;
+ /* bo has been pinned, not need validate it */
+ if (bo->tbo.pin_count)
+ return 0;
+
amdgpu_bo_placement_from_domain(bo, domain);
ret = ttm_bo_validate(&bo->tbo, &bo->placement, &ctx);
@@ -2631,7 +2635,7 @@ static int confirm_valid_user_pages_locked(struct amdkfd_process_info *process_i
/* keep mem without hmm range at userptr_inval_list */
if (!mem->range)
- continue;
+ continue;
/* Only check mem with hmm range associated */
valid = amdgpu_ttm_tt_get_user_pages_done(
@@ -2848,9 +2852,6 @@ int amdgpu_amdkfd_gpuvm_restore_process_bos(void *info, struct dma_fence **ef)
if (!attachment->is_mapped)
continue;
- if (attachment->bo_va->base.bo->tbo.pin_count)
- continue;
-
kfd_mem_dmaunmap_attachment(mem, attachment);
ret = update_gpuvm_pte(mem, attachment, &sync_obj);
if (ret) {
--
2.43.0
