[ Upstream commit 899ecaed ]

Socket buffer is not re-created when headroom is 2 and tailroom is 1.
Signed-off-by: NTristram Ha <Tristram.Ha@microchip.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>