net: consolidate and fix ethtool_ops->get_settings calling

This patch does several things:
- introduces __ethtool_get_settings which is called from ethtool code and
  from drivers as well. Put ASSERT_RTNL there.
- dev_ethtool_get_settings() is replaced by __ethtool_get_settings()
- changes calling in drivers so rtnl locking is respected. In
  iboe_get_rate was previously ->get_settings() called unlocked. This
  fixes it. Also prb_calc_retire_blk_tmo() in af_packet.c had the same
  problem. Also fixed by calling __dev_get_by_index() instead of
  dev_get_by_index() and holding rtnl_lock for both calls.
- introduces rtnl_lock in bnx2fc_vport_create() and fcoe_vport_create()
  so bnx2fc_if_create() and fcoe_if_create() are called locked as they
  are from other places.
- use __ethtool_get_settings() in bonding code

Signed-off-by: Jiri Pirko <jpirko@redhat.com>

v2->v3:
	-removed dev_ethtool_get_settings()
	-added ASSERT_RTNL into __ethtool_get_settings()
	-prb_calc_retire_blk_tmo - use __dev_get_by_index() and lock
	 around it and __ethtool_get_settings() call
v1->v2:
        add missing export_symbol
Reviewed-by: Ben Hutchings <bhutchings@solarflare.com> [except FCoE bits]
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 13 insertions, 11 deletions

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 8cb75a6efec3..1dcb07ce5263 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -557,7 +557,7 @@ down:
 static int bond_update_speed_duplex(struct slave *slave)
 {
 	struct net_device *slave_dev = slave->dev;
-	struct ethtool_cmd etool = { .cmd = ETHTOOL_GSET };
+	struct ethtool_cmd ecmd;
 	u32 slave_speed;
 	int res;
 
@@ -565,18 +565,15 @@ static int bond_update_speed_duplex(struct slave *slave)
 	slave->speed = SPEED_100;
 	slave->duplex = DUPLEX_FULL;
 
-	if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
-		return -1;
-
-	res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
+	res = __ethtool_get_settings(slave_dev, &ecmd);
 	if (res < 0)
 		return -1;
 
-	slave_speed = ethtool_cmd_speed(&etool);
+	slave_speed = ethtool_cmd_speed(&ecmd);
 	if (slave_speed == 0 || slave_speed == ((__u32) -1))
 		return -1;
 
-	switch (etool.duplex) {
+	switch (ecmd.duplex) {
 	case DUPLEX_FULL:
 	case DUPLEX_HALF:
 		break;
@@ -585,7 +582,7 @@ static int bond_update_speed_duplex(struct slave *slave)
 	}
 
 	slave->speed = slave_speed;
-	slave->duplex = etool.duplex;
+	slave->duplex = ecmd.duplex;
 
 	return 0;
 }
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c
index 836e13fcb3ec..b100c90e8507 100644
--- a/drivers/net/macvlan.c
+++ b/drivers/net/macvlan.c
@@ -543,7 +543,8 @@ static int macvlan_ethtool_get_settings(struct net_device *dev,
 					struct ethtool_cmd *cmd)
 {
 	const struct macvlan_dev *vlan = netdev_priv(dev);
-	return dev_ethtool_get_settings(vlan->lowerdev, cmd);
+
+	return __ethtool_get_settings(vlan->lowerdev, cmd);
 }
 
 static const struct ethtool_ops macvlan_ethtool_ops = {
diff --git a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
index 2c780a78fcbd..820a1840c3f7 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_fcoe.c
@@ -673,7 +673,7 @@ static void bnx2fc_link_speed_update(struct fc_lport *lport)
 	struct net_device *netdev = interface->netdev;
 	struct ethtool_cmd ecmd;
 
-	if (!dev_ethtool_get_settings(netdev, &ecmd)) {
+	if (!__ethtool_get_settings(netdev, &ecmd)) {
 		lport->link_supported_speeds &=
 			~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
 		if (ecmd.supported & (SUPPORTED_1000baseT_Half |
@@ -1001,9 +1001,11 @@ static int bnx2fc_vport_create(struct fc_vport *vport, bool disabled)
 			"this interface\n");
 		return -EIO;
 	}
+	rtnl_lock();
 	mutex_lock(&bnx2fc_dev_lock);
 	vn_port = bnx2fc_if_create(interface, &vport->dev, 1);
 	mutex_unlock(&bnx2fc_dev_lock);
+	rtnl_unlock();
 
 	if (IS_ERR(vn_port)) {
 		printk(KERN_ERR PFX "bnx2fc_vport_create (%s) failed\n",
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 3416ab673814..83aa3ac52c40 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -2043,7 +2043,7 @@ int fcoe_link_speed_update(struct fc_lport *lport)
 	struct net_device *netdev = fcoe_netdev(lport);
 	struct ethtool_cmd ecmd;
 
-	if (!dev_ethtool_get_settings(netdev, &ecmd)) {
+	if (!__ethtool_get_settings(netdev, &ecmd)) {
 		lport->link_supported_speeds &=
 			~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
 		if (ecmd.supported & (SUPPORTED_1000baseT_Half |
@@ -2452,7 +2452,9 @@ static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
 	}
 
 	mutex_lock(&fcoe_config_mutex);
+	rtnl_lock();
 	vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
+	rtnl_unlock();
 	mutex_unlock(&fcoe_config_mutex);
 
 	if (IS_ERR(vn_port)) {