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: v5.8.10~112
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ca9e7f16d783a12909d1ef6ce36fe5fd09b5c86d;p=thirdparty%2Fkernel%2Fstable.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 1ea15f2123ed5..cc297ea9c6ece 100644
--- a/drivers/net/wan/lapbether.c
+++ b/drivers/net/wan/lapbether.c
@@ -340,6 +340,7 @@ 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;