One of the error paths in vmw_setup_otable_base causes us to return with
'ret' having never been set to anything causing us to return whatever was
on the stack.

Found with Coverity

Signed-off-by: Dave Jones <da...@fedoraproject.org>

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c 
b/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
index 4910e7b81811..d4a5a19cb8c3 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_mob.c
@@ -134,6 +134,7 @@ static int vmw_setup_otable_base(struct vmw_private 
*dev_priv,
        cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
        if (unlikely(cmd == NULL)) {
                DRM_ERROR("Failed reserving FIFO space for OTable setup.\n");
+               ret = -ENOMEM;
                goto out_no_fifo;
        }
 
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