mac80211: dont use interface indices in drivers

This patch gets rid of the if_id stuff where possible in favour of
a new per-virtual-interface structure "struct ieee80211_vif". This
structure is located at the end of the per-interface structure and
contains a variable length driver-use data area.

This has two advantages:
 * removes the need to look up interfaces by if_id, this is better
   for working with network namespaces and performance
 * allows drivers to store and retrieve per-interface data without
   having to allocate own lists/hash tables

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 4 deletions

diff --git a/drivers/net/wireless/rtl8180_dev.c b/drivers/net/wireless/rtl8180_dev.c
index 4b7b032c194a..07f37b0ccf91 100644
--- a/drivers/net/wireless/rtl8180_dev.c
+++ b/drivers/net/wireless/rtl8180_dev.c
@@ -236,7 +236,8 @@ static int rtl8180_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
                 kmemdup(control, sizeof(*control), GFP_ATOMIC);
 
         if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS)
-                rts_duration = ieee80211_rts_duration(dev, priv->if_id, skb->len, control);
+                rts_duration = ieee80211_rts_duration(dev, priv->vif, skb->len,
+                                                      control);
 
         if (!priv->r8185) {
                 unsigned int remainder;
@@ -638,6 +639,8 @@ static int rtl8180_add_interface(struct ieee80211_hw *dev,
                 return -EOPNOTSUPP;
         }
 
+        priv->vif = conf->vif;
+
         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
         rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->MAC[0],
                           cpu_to_le32(*(u32 *)conf->mac_addr));
@@ -653,6 +656,7 @@ static void rtl8180_remove_interface(struct ieee80211_hw *dev,
 {
         struct rtl8180_priv *priv = dev->priv;
         priv->mode = IEEE80211_IF_TYPE_MNTR;
+        priv->vif = NULL;
 }
 
 static int rtl8180_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
@@ -664,14 +668,13 @@ static int rtl8180_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
         return 0;
 }
 
-static int rtl8180_config_interface(struct ieee80211_hw *dev, int if_id,
+static int rtl8180_config_interface(struct ieee80211_hw *dev,
+                                    struct ieee80211_vif *vif,
                                     struct ieee80211_if_conf *conf)
 {
         struct rtl8180_priv *priv = dev->priv;
         int i;
 
-        priv->if_id = if_id;
-
         for (i = 0; i < ETH_ALEN; i++)
                 rtl818x_iowrite8(priv, &priv->map->BSSID[i], conf->bssid[i]);