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Date: Mon, 18 Apr 2016 11:28:56 +0900 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Phil Sutter <phil@....cc>, Jason Wang <jasowang@...hat.com>, "Michael S. Tsirkin" <mst@...hat.com>, "David S. Miller" <davem@...emloft.net> Subject: [PATCH 4.4 074/137] tuntap: restore default qdisc 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jason Wang <jasowang@...hat.com> [ Upstream commit 016adb7260f481168c03e09f785184d6d5278894 ] After commit f84bb1eac027 ("net: fix IFF_NO_QUEUE for drivers using alloc_netdev"), default qdisc was changed to noqueue because tuntap does not set tx_queue_len during .setup(). This patch restores default qdisc by setting tx_queue_len in tun_setup(). Fixes: f84bb1eac027 ("net: fix IFF_NO_QUEUE for drivers using alloc_netdev") Cc: Phil Sutter <phil@....cc> Signed-off-by: Jason Wang <jasowang@...hat.com> Acked-by: Michael S. Tsirkin <mst@...hat.com> Acked-by: Phil Sutter <phil@....cc> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/net/tun.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -1001,7 +1001,6 @@ static void tun_net_init(struct net_devi /* Zero header length */ dev->type = ARPHRD_NONE; dev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; - dev->tx_queue_len = TUN_READQ_SIZE; /* We prefer our own queue length */ break; case IFF_TAP: @@ -1013,7 +1012,6 @@ static void tun_net_init(struct net_devi eth_hw_addr_random(dev); - dev->tx_queue_len = TUN_READQ_SIZE; /* We prefer our own queue length */ break; } } @@ -1464,6 +1462,8 @@ static void tun_setup(struct net_device dev->ethtool_ops = &tun_ethtool_ops; dev->destructor = tun_free_netdev; + /* We prefer our own queue length */ + dev->tx_queue_len = TUN_READQ_SIZE; } /* Trivial set of netlink ops to allow deleting tun or tap
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