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net: dsa: simplify netdevice events handling

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Simplify the code handling the slave netdevice notifier call by
providing a dsa_slave_changeupper helper for NETDEV_CHANGEUPPER, and so
on (only this event is supported at the moment.)

Return NOTIFY_DONE when we did not care about an event, and NOTIFY_OK
when we were concerned but no error occurred, as the API suggests.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vivien Didelot 2017-02-03 13:20:17 -05:00 committed by David S. Miller
parent 88e4f0ca4e
commit 8e92ab3a42
1 changed files with 16 additions and 28 deletions
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44
net/dsa/slave.c
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@ -1491,37 +1491,22 @@ static bool dsa_slave_dev_check(struct net_device *dev)
return dev->netdev_ops == &dsa_slave_netdev_ops;
}
static int dsa_slave_port_upper_event(struct net_device *dev,
unsigned long event, void *ptr)
static int dsa_slave_changeupper(struct net_device *dev,
struct netdev_notifier_changeupper_info *info)
{
struct netdev_notifier_changeupper_info *info = ptr;
struct net_device *upper = info->upper_dev;
int err = 0;
int err = NOTIFY_DONE;
switch (event) {
case NETDEV_CHANGEUPPER:
if (netif_is_bridge_master(upper)) {
if (info->linking)
err = dsa_slave_bridge_port_join(dev, upper);
else
dsa_slave_bridge_port_leave(dev, upper);
if (netif_is_bridge_master(info->upper_dev)) {
if (info->linking) {
err = dsa_slave_bridge_port_join(dev, info->upper_dev);
err = notifier_from_errno(err);
} else {
dsa_slave_bridge_port_leave(dev, info->upper_dev);
err = NOTIFY_OK;
}
break;
}
return notifier_from_errno(err);
}
static int dsa_slave_port_event(struct net_device *dev, unsigned long event,
void *ptr)
{
switch (event) {
case NETDEV_CHANGEUPPER:
return dsa_slave_port_upper_event(dev, event, ptr);
}
return NOTIFY_DONE;
return err;
}
static int dsa_slave_netdevice_event(struct notifier_block *nb,
@ -1529,8 +1514,11 @@ static int dsa_slave_netdevice_event(struct notifier_block *nb,
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
if (dsa_slave_dev_check(dev))
return dsa_slave_port_event(dev, event, ptr);
if (dev->netdev_ops != &dsa_slave_netdev_ops)
return NOTIFY_DONE;
if (event == NETDEV_CHANGEUPPER)
return dsa_slave_changeupper(dev, ptr);
return NOTIFY_DONE;
}