[PATCH RFC 2/2] tun: don't set a default qdisc

[Paolo Abeni]

This patch disables the default qdisc by explicitly setting the
IFF_NO_QUEUE private flag so that now the tun xmit path do not
require any lock by default.

The default qdisc was first removed as a side effect of commit
f84bb1eac027 ("net: fix IFF_NO_QUEUE for drivers using alloc_netdev")
and recently restored with commit 016adb7260f4 ("tuntap: restore default qdisc")

Signed-off-by: Paolo Abeni <pab...@redhat.com>
---
 drivers/net/tun.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 42992dc..0a0b63c 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -1081,6 +1081,7 @@ static void tun_net_init(struct net_device *dev)
 
                break;
        }
+       dev->priv_flags |= IFF_NO_QUEUE;
 }
 
 /* Character device part */
-- 
1.8.3.1