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.

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 7cb7ffdd190032af6ed279e6255537ae6a7ebd23..dfb5ca3f8da8979a4f5232eacc5d82311d55d7c6 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -680,9 +680,9 @@ int amdgpu_ttm_tt_get_user_pages(struct amdgpu_bo *bo, struct page **pages)
                return -ESRCH;
 
        mmap_read_lock(mm);
-       vma = find_vma(mm, start);
+       vma = vma_lookup(mm, start);
        mmap_read_unlock(mm);
-       if (unlikely(!vma || start < vma->vm_start)) {
+       if (unlikely(!vma)) {
                r = -EFAULT;
                goto out_putmm;
        }