[PATCH] drm/amdgpu: Uninitialized variable in amdgpu_ttm_backend_bind()

[dan.carpenter@xxxxxxxxxx (Dan Carpenter)]

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.carpenter at 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);