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From:   Liam Howlett <liam.howlett@oracle.com>
To:     Andrew Morton <akpm@linux-foundation.org>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
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CC:     David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>
Subject: [PATCH] drm/amdgpu: Use vma_lookup() in
 amdgpu_ttm_tt_get_user_pages()
Thread-Topic: [PATCH] drm/amdgpu: Use vma_lookup() in
 amdgpu_ttm_tt_get_user_pages()
Thread-Index: AQHXWJLf9LBXqSSmAk626hIUEgtUSQ==
Date:   Thu, 3 Jun 2021 16:09:46 +0000
Message-ID: <20210603160928.3854180-1-Liam.Howlett@Oracle.com>
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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>
---
 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;
=20
 	mmap_read_lock(mm);
-	vma =3D find_vma(mm, start);
+	vma =3D vma_lookup(mm, start);
 	mmap_read_unlock(mm);
-	if (unlikely(!vma || start < vma->vm_start)) {
+	if (unlikely(!vma)) {
 		r =3D -EFAULT;
 		goto out_putmm;
 	}
--=20
2.30.2