From d9bf5f130946695063469749bfd190087b7fad39 Mon Sep 17 00:00:00 2001
From: Weiping Pan <wpan@redhat.com>
Date: Tue, 13 Aug 2013 21:46:56 +0800
Subject: [PATCH] tun: compare with 0 instead of total_len

Since we set "len = total_len" in the beginning of tun_get_user(),
so we should compare the new len with 0, instead of total_len,
or the if statement always returns false.

Signed-off-by: Weiping Pan <wpan@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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