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f_phonet: lock-less MTU change

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With the current driver, the MTU is purely indicative, so there is no
need to synchronize with the receive path.

Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Rémi Denis-Courmont 2009-08-06 21:56:43 +00:00 committed by David S. Miller
parent aa11d958d1
commit 5da63cc4b2
1 changed files with 2 additions and 12 deletions
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14
drivers/usb/gadget/f_phonet.c
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@ -261,20 +261,10 @@ out:
static int pn_net_mtu(struct net_device *dev, int new_mtu) static int pn_net_mtu(struct net_device *dev, int new_mtu)
{ {
struct phonet_port *port = netdev_priv(dev);
unsigned long flags;
int err = -EBUSY;
if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU)) if ((new_mtu < PHONET_MIN_MTU) || (new_mtu > PHONET_MAX_MTU))
return -EINVAL; return -EINVAL;
dev->mtu = new_mtu;
spin_lock_irqsave(&port->lock, flags); return 0;
if (!netif_carrier_ok(dev)) {
dev->mtu = new_mtu;
err = 0;
}
spin_unlock_irqrestore(&port->lock, flags);
return err;
} }
static const struct net_device_ops pn_netdev_ops = { static const struct net_device_ops pn_netdev_ops = {