From: Liam Howlett <liam.howlett@xxxxxxxxxx> Subject: drm/amdgpu: use vma_lookup() in amdgpu_ttm_tt_get_user_pages() Use vma_lookup() to find the VMA at a specific address. As vma_lookup() will return NULL if the address is not within any VMA, the start address no longer needs to be validated. Link: https://lkml.kernel.org/r/20210521174745.2219620-14-Liam.Howlett@xxxxxxxxxx Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> Reviewed-by: Laurent Dufour <ldufour@xxxxxxxxxxxxx> Acked-by: David Hildenbrand <david@xxxxxxxxxx> Acked-by: Davidlohr Bueso <dbueso@xxxxxxx> Acked-by: Alex Deucher <alexander.deucher@xxxxxxx> Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c~drm-amdgpu-use-vma_lookup-in-amdgpu_ttm_tt_get_user_pages +++ a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -709,8 +709,8 @@ int amdgpu_ttm_tt_get_user_pages(struct } mmap_read_lock(mm); - vma = find_vma(mm, start); - if (unlikely(!vma || start < vma->vm_start)) { + vma = vma_lookup(mm, start); + if (unlikely(!vma)) { r = -EFAULT; goto out_unlock; } _
