From: Xie He <xie.he.0141@gmail.com>
Date: Fri, 21 Aug 2020 21:26:59 +0000 (-0700)
Subject: drivers/net/wan/lapbether: Added needed_tailroom
X-Git-Tag: v4.14.199~84
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=ac10e8c968fbb4b0df53810581c17bd3a387f8d9;p=users%2Fdwmw2%2Flinux.git

drivers/net/wan/lapbether: Added needed_tailroom

[ Upstream commit 1ee39c1448c4e0d480c5b390e2db1987561fb5c2 ]

The underlying Ethernet device may request necessary tailroom to be
allocated by setting needed_tailroom. This driver should also set
needed_tailroom to request the tailroom needed by the underlying
Ethernet device to be allocated.

Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: Martin Schiller <ms@dev.tdt.de>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index c94dfa70f2a33..6b2553e893aca 100644
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -343,6 +343,7 @@ static int lapbeth_new_device(struct net_device *dev)
 	 */
 	ndev->needed_headroom = -1 + 3 + 2 + dev->hard_header_len
 					   + dev->needed_headroom;
+	ndev->needed_tailroom = dev->needed_tailroom;
 
 	lapbeth = netdev_priv(ndev);
 	lapbeth->axdev = ndev;