[PATCH] drm/amdgpu: Use vma_lookup() in amdgpu_ttm_tt_get_user_pages()

[Liam Howlett]

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 at Oracle.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index 7cb7ffdd1900..dfb5ca3f8da8 100644
--- 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;
 	}
-- 
2.30.2