net: vlan, qlcnic: make vlan_find_dev private

there is only one user of vlan_find_dev outside of the actual vlan code:
qlcnic uses it to iterate over some VLANs it knows.

let's just make vlan_find_dev private to the VLAN code and have the
iteration in qlcnic be a bit more direct. (a few rcu dereferences less
too)
Signed-off-by: David Lamparter <equinox@diac24.net>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Amit Kumar Salecha <amit.salecha@qlogic.com>
Cc: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Cc: linux-driver@qlogic.com
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/qlcnic/qlcnic_main.c

@@ -4198,13 +4198,18 @@ static void
 qlcnic_restore_indev_addr(struct net_device *netdev, unsigned long event)
 {
 	struct qlcnic_adapter *adapter = netdev_priv(netdev);
+	struct vlan_group *grp;
 	struct net_device *dev;
 	u16 vid;
 
 	qlcnic_config_indev_addr(adapter, netdev, event);
 
+	grp = rcu_dereference_rtnl(netdev->vlgrp);
+	if (!grp)
+		return;
+
 	for_each_set_bit(vid, adapter->vlans, VLAN_N_VID) {
-		dev = vlan_find_dev(netdev, vid);
+		dev = vlan_group_get_device(grp, vid);
 		if (!dev)
 			continue;
 		qlcnic_config_indev_addr(adapter, dev, event);

include/linux/if_vlan.h

@@ -119,17 +119,6 @@ static inline int is_vlan_dev(struct net_device *dev)
 #define vlan_tx_tag_get(__skb)		((__skb)->vlan_tci & ~VLAN_TAG_PRESENT)
 
 #if defined(CONFIG_VLAN_8021Q) || defined(CONFIG_VLAN_8021Q_MODULE)
-/* Must be invoked with rcu_read_lock or with RTNL. */
-static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
-					       u16 vlan_id)
-{
-	struct vlan_group *grp = rcu_dereference_rtnl(real_dev->vlgrp);
-
-	if (grp)
-		return vlan_group_get_device(grp, vlan_id);
-
-	return NULL;
-}
 
 extern struct net_device *vlan_dev_real_dev(const struct net_device *dev);
 extern u16 vlan_dev_vlan_id(const struct net_device *dev);

net/8021q/vlan.h

@@ -74,6 +74,18 @@ static inline struct vlan_dev_info *vlan_dev_info(const struct net_device *dev)
 	return netdev_priv(dev);
 }
 
+/* Must be invoked with rcu_read_lock or with RTNL. */
+static inline struct net_device *vlan_find_dev(struct net_device *real_dev,
+					       u16 vlan_id)
+{
+	struct vlan_group *grp = rcu_dereference_rtnl(real_dev->vlgrp);
+
+	if (grp)
+		return vlan_group_get_device(grp, vlan_id);
+
+	return NULL;
+}
+
 /* found in vlan_dev.c */
 void vlan_dev_set_ingress_priority(const struct net_device *dev,
 				   u32 skb_prio, u16 vlan_prio);