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IPoIB: Use rtnl lock/unlock when changing device flags

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Use of this lock is required to synchronize changes to the netdvice's
data structs.  Also move the call to ipoib_flush_paths() after the
modification of the netdevice flags in set_mode().

Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Eli Cohen 2008-07-14 23:48:51 -07:00 • committed by Roland Dreier
commit c8c2afe360
2 changed files with 10 additions and 3 deletions
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8
drivers/infiniband/ulp/ipoib/ipoib_cm.c
View file

@ -1440,7 +1440,9 @@ static ssize_t set_mode(struct device *d, struct device_attribute *attr,
ipoib_warn(priv, "enabling connected mode "
"will cause multicast packet drops\n");
rtnl_lock();
dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_TSO);
rtnl_unlock();
priv->tx_wr.send_flags &= ~IB_SEND_IP_CSUM;
ipoib_flush_paths(dev);
@ -1449,14 +1451,16 @@ static ssize_t set_mode(struct device *d, struct device_attribute *attr,
if (!strcmp(buf, "datagram\n")) {
clear_bit(IPOIB_FLAG_ADMIN_CM, &priv->flags);
dev->mtu = min(priv->mcast_mtu, dev->mtu);
ipoib_flush_paths(dev);
rtnl_lock();
if (test_bit(IPOIB_FLAG_CSUM, &priv->flags)) {
dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG;
if (priv->hca_caps & IB_DEVICE_UD_TSO)
dev->features |= NETIF_F_TSO;
}
dev->mtu = min(priv->mcast_mtu, dev->mtu);
rtnl_unlock();
ipoib_flush_paths(dev);
return count;
}

5
drivers/infiniband/ulp/ipoib/ipoib_multicast.c
View file

@ -575,8 +575,11 @@ void ipoib_mcast_join_task(struct work_struct *work)
priv->mcast_mtu = IPOIB_UD_MTU(ib_mtu_enum_to_int(priv->broadcast->mcmember.mtu));
if (!ipoib_cm_admin_enabled(dev))
if (!ipoib_cm_admin_enabled(dev)) {
rtnl_lock();
dev->mtu = min(priv->mcast_mtu, priv->admin_mtu);
rtnl_unlock();
}
ipoib_dbg_mcast(priv, "successfully joined all multicast groups\n");