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Date:   Fri, 21 Aug 2020 14:26:59 -0700
From:   Xie He <>
To:     "David S. Miller" <>,
        Jakub Kicinski <>,,,
Cc:     Xie He <>,
        Willem de Bruijn <>,
        Martin Schiller <>
Subject: [PATCH net v2] drivers/net/wan/lapbether: Added needed_tailroom

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 <>
Cc: Martin Schiller <>
Signed-off-by: Xie He <>
Change from v1:
I'm re-sending this patch unchanged because the previous reviewer has
stopped responding for 11 days and he didn't indicate what change I
should do to this patch.

It's hard to find reviewers for this code. I tried to send emails, but
people don't respond. If you can review it, I'd really appreciate it.
I'm not in a hurry so please take your time. Thanks!
 drivers/net/wan/lapbether.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wan/lapbether.c b/drivers/net/wan/lapbether.c
index 1ea15f2123ed..cc297ea9c6ec 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;

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