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Commit ed7b521d authored by Erez Shitrit's avatar Erez Shitrit Committed by Doug Ledford
Browse files

IB/IPoIB: Forward MTU change to driver below 



This patch checks if there is a driver below that
needs to be updated on the new MTU and calls it
accordingly.

Signed-off-by: default avatarErez Shitrit <erezsh@mellanox.com>
Reviewed by: Alex Vesker <valex@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Reviewed-by: default avatarYuval Shaia <yuval.shaia@oracle.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 98e77d9f

drivers/infiniband/ulp/ipoib/ipoib_main.c

+17 −2
Original line number Diff line number Diff line
@@ -233,6 +233,7 @@ static netdev_features_t ipoib_fix_features(struct net_device *dev, netdev_featu 
static int ipoib_change_mtu(struct net_device *dev, int new_mtu)

{

	struct ipoib_dev_priv *priv = ipoib_priv(dev);

	int ret = 0;



	/* dev->mtu > 2K ==> connected mode */

	if (ipoib_cm_admin_enabled(dev)) {
@@ -256,9 +257,23 @@ static int ipoib_change_mtu(struct net_device *dev, int new_mtu) 
		ipoib_dbg(priv, "MTU must be smaller than the underlying "

				"link layer MTU - 4 (%u)\n", priv->mcast_mtu);



	dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);

	new_mtu = min(priv->mcast_mtu, priv->admin_mtu);



	return 0;

	if (priv->rn_ops->ndo_change_mtu) {

		bool carrier_status = netif_carrier_ok(dev);



		netif_carrier_off(dev);



		/* notify lower level on the real mtu */

		ret = priv->rn_ops->ndo_change_mtu(dev, new_mtu);



		if (carrier_status)

			netif_carrier_on(dev);

	} else {

		dev->mtu = new_mtu;

	}



	return ret;

}



/* Called with an RCU read lock taken */