My static checker complains that it's possible for "r" to be
uninitialized.  It used to be set to zero so this returns it to the old
behavior.

Fixes: 98a7f88ce9a9 ("drm/amdgpu: bind BOs with GTT space allocated directly 
v2")
Signed-off-by: Dan Carpenter <dan.carpen...@oracle.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c 
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
index e6f9a54c959d..b5f2a08757d6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
@@ -753,7 +753,7 @@ static int amdgpu_ttm_backend_bind(struct ttm_tt *ttm,
                                   struct ttm_mem_reg *bo_mem)
 {
        struct amdgpu_ttm_tt *gtt = (void*)ttm;
-       int r;
+       int r = 0;
 
        if (gtt->userptr) {
                r = amdgpu_ttm_tt_pin_userptr(ttm);
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