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drm/amdgpu: fix VM leaf walking 

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 <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by:  Rex Zhu Rex.Zhu@amd.com
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2018-10-24 16:25:23 +02:00 committed by Alex Deucher
parent 0af5c656fd
commit 4faaaa7623
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
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@ -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));
}
/**