[PATCH 1/1] drm/amdgpu: vm flush needed after updating PDEs

[Philip Yang]

If page table PDEs is evicted and restored, after updating PDEs, need
increase vm->tlb_seq, then amdgpu_vm_flush will flush TLB before command
submission.

Signed-off-by: Philip Yang <Philip.Yang at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 7276b03ef970..9596c22fded6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -764,6 +764,9 @@ int amdgpu_vm_update_pdes(struct amdgpu_device *adev,
 	if (r)
 		goto error;
 
+	/* vm_flush_needed after updating PDEs */
+	atomic64_inc(&vm->tlb_seq);
+
 	while (!list_empty(&vm->relocated)) {
 		entry = list_first_entry(&vm->relocated,
 					 struct amdgpu_vm_bo_base,
-- 
2.35.1