From 4faaaa762328cfb8579b9c908999ca189e2ea474 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Christian=20K=C3=B6nig?= Date: Wed, 24 Oct 2018 16:25:23 +0200 Subject: [PATCH] drm/amdgpu: fix VM leaf walking MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Make sure we don't try to go down further after the leave walk already ended. This fixes a crash with a new VM test. Signed-off-by: Christian König Reviewed-by: Felix Kuehling Acked-by: Alex Deucher Tested-by: Rex Zhu Rex.Zhu@amd.com Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index db0cbf8d219d..352b30409060 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -542,7 +542,8 @@ static void amdgpu_vm_pt_next_leaf(struct amdgpu_device *adev, struct amdgpu_vm_pt_cursor *cursor) { amdgpu_vm_pt_next(adev, cursor); - while (amdgpu_vm_pt_descendant(adev, cursor)); + if (cursor->pfn != ~0ll) + while (amdgpu_vm_pt_descendant(adev, cursor)); } /**