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| author | Xin Long <lucien.xin@gmail.com> | 2018-04-22 19:11:50 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-04-29 11:32:00 +0200 |
| commit | a43e7cba5444f062defc2145fe0b83b28ac35d5f (patch) | |
| tree | 798ef8016c1056c33d4d317f3cdba26efa914a15 | |
| parent | 037069f2c62510b23dbc67b6894a1c152562f7b5 (diff) | |
bonding: do not set slave_dev npinfo before slave_enable_netpoll in bond_enslave
[ Upstream commit ddea788c63094f7c483783265563dd5b50052e28 ]
After Commit 8a8efa22f51b ("bonding: sync netpoll code with bridge"), it
would set slave_dev npinfo in slave_enable_netpoll when enslaving a dev
if bond->dev->npinfo was set.
However now slave_dev npinfo is set with bond->dev->npinfo before calling
slave_enable_netpoll. With slave_dev npinfo set, __netpoll_setup called
in slave_enable_netpoll will not call slave dev's .ndo_netpoll_setup().
It causes that the lower dev of this slave dev can't set its npinfo.
One way to reproduce it:
# modprobe bonding
# brctl addbr br0
# brctl addif br0 eth1
# ifconfig bond0 192.168.122.1/24 up
# ifenslave bond0 eth2
# systemctl restart netconsole
# ifenslave bond0 br0
# ifconfig eth2 down
# systemctl restart netconsole
The netpoll won't really work.
This patch is to remove that slave_dev npinfo setting in bond_enslave().
Fixes: 8a8efa22f51b ("bonding: sync netpoll code with bridge")
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/bonding/bond_main.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 513457a2a7bf..13a015b8052b 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -1654,8 +1654,7 @@ int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) } /* switch(bond_mode) */ #ifdef CONFIG_NET_POLL_CONTROLLER - slave_dev->npinfo = bond->dev->npinfo; - if (slave_dev->npinfo) { + if (bond->dev->npinfo) { if (slave_enable_netpoll(new_slave)) { netdev_info(bond_dev, "master_dev is using netpoll, but new slave device does not support netpoll\n"); res = -EBUSY; |