Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 91ba4795 authored by Andrew Lunn's avatar Andrew Lunn Committed by David S. Miller
Browse files

net: dsa: Restore MTU on master device on unload 



A previous change tries to set the MTU on the master device to take
into account the DSA overheads. This patch tries to reset the master
device back to the default MTU.

Signed-off-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 120d633f

net/dsa/master.c

+13 −0
Original line number Diff line number Diff line
@@ -172,6 +172,18 @@ void dsa_master_set_mtu(struct net_device *dev, struct dsa_port *cpu_dp) 
	rtnl_unlock();

}



static void dsa_master_reset_mtu(struct net_device *dev)

{

	int err;



	rtnl_lock();

	err = dev_set_mtu(dev, ETH_DATA_LEN);

	if (err)

		netdev_dbg(dev,

			   "Unable to reset MTU to exclude DSA overheads\n");

	rtnl_unlock();

}



int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp)

{

	dsa_master_set_mtu(dev,  cpu_dp);
@@ -190,6 +202,7 @@ int dsa_master_setup(struct net_device *dev, struct dsa_port *cpu_dp) 
void dsa_master_teardown(struct net_device *dev)

{

	dsa_master_ethtool_teardown(dev);

	dsa_master_reset_mtu(dev);



	dev->dsa_ptr = NULL;