Commit fc9c89b1 authored by David S. Miller's avatar David S. Miller

Merge branch 'bridge-register-netdev-before-changelink'

Ido Schimmel says:

====================
bridge: Fix kernel oops during bridge creation

First patch adds a missing ndo_uninit() in the bridge driver, which is a
prerequisite for the second patch that actually fixes the oops.

Please consider both patches for 4.4.y, 4.9.y and 4.10.y
====================
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 96a94cc5 5b8d5429
......@@ -119,6 +119,15 @@ static int br_dev_init(struct net_device *dev)
return err;
}
static void br_dev_uninit(struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
br_multicast_uninit_stats(br);
br_vlan_flush(br);
free_percpu(br->stats);
}
static int br_dev_open(struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
......@@ -332,6 +341,7 @@ static const struct net_device_ops br_netdev_ops = {
.ndo_open = br_dev_open,
.ndo_stop = br_dev_stop,
.ndo_init = br_dev_init,
.ndo_uninit = br_dev_uninit,
.ndo_start_xmit = br_dev_xmit,
.ndo_get_stats64 = br_get_stats64,
.ndo_set_mac_address = br_set_mac_address,
......@@ -356,14 +366,6 @@ static const struct net_device_ops br_netdev_ops = {
.ndo_features_check = passthru_features_check,
};
static void br_dev_free(struct net_device *dev)
{
struct net_bridge *br = netdev_priv(dev);
free_percpu(br->stats);
free_netdev(dev);
}
static struct device_type br_type = {
.name = "bridge",
};
......@@ -376,7 +378,7 @@ void br_dev_setup(struct net_device *dev)
ether_setup(dev);
dev->netdev_ops = &br_netdev_ops;
dev->destructor = br_dev_free;
dev->destructor = free_netdev;
dev->ethtool_ops = &br_ethtool_ops;
SET_NETDEV_DEVTYPE(dev, &br_type);
dev->priv_flags = IFF_EBRIDGE | IFF_NO_QUEUE;
......
......@@ -311,7 +311,6 @@ void br_dev_delete(struct net_device *dev, struct list_head *head)
br_fdb_delete_by_port(br, NULL, 0, 1);
br_vlan_flush(br);
br_multicast_dev_del(br);
cancel_delayed_work_sync(&br->gc_work);
......
......@@ -2031,8 +2031,6 @@ void br_multicast_dev_del(struct net_bridge *br)
out:
spin_unlock_bh(&br->multicast_lock);
free_percpu(br->mcast_stats);
}
int br_multicast_set_router(struct net_bridge *br, unsigned long val)
......@@ -2531,6 +2529,11 @@ int br_multicast_init_stats(struct net_bridge *br)
return 0;
}
void br_multicast_uninit_stats(struct net_bridge *br)
{
free_percpu(br->mcast_stats);
}
static void mcast_stats_add_dir(u64 *dst, u64 *src)
{
dst[BR_MCAST_DIR_RX] += src[BR_MCAST_DIR_RX];
......
......@@ -1165,11 +1165,14 @@ static int br_dev_newlink(struct net *src_net, struct net_device *dev,
spin_unlock_bh(&br->lock);
}
err = br_changelink(dev, tb, data);
err = register_netdevice(dev);
if (err)
return err;
return register_netdevice(dev);
err = br_changelink(dev, tb, data);
if (err)
unregister_netdevice(dev);
return err;
}
static size_t br_get_size(const struct net_device *brdev)
......
......@@ -620,6 +620,7 @@ void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
const struct sk_buff *skb, u8 type, u8 dir);
int br_multicast_init_stats(struct net_bridge *br);
void br_multicast_uninit_stats(struct net_bridge *br);
void br_multicast_get_stats(const struct net_bridge *br,
const struct net_bridge_port *p,
struct br_mcast_stats *dest);
......@@ -760,6 +761,10 @@ static inline int br_multicast_init_stats(struct net_bridge *br)
return 0;
}
static inline void br_multicast_uninit_stats(struct net_bridge *br)
{
}
static inline int br_multicast_igmp_type(const struct sk_buff *skb)
{
return 0;
......
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