mwl8k: convert the priv->vif pointer to a list of vifs

To prepare for adding multi-BSS support.

Signed-off-by: Lennert Buytenhek <buytenh@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 35 insertions, 16 deletions

diff --git a/drivers/net/wireless/mwl8k.c b/drivers/net/wireless/mwl8k.c
index 382ef4305a3e..ee7d8a6329f8 100644
--- a/drivers/net/wireless/mwl8k.c
+++ b/drivers/net/wireless/mwl8k.c
@@ -160,7 +160,8 @@ struct mwl8k_priv {
         /* TX quiesce completion, protected by fw_mutex and tx_lock */
         struct completion *tx_wait;
 
-        struct ieee80211_vif *vif;
+        /* List of interfaces.  */
+        struct list_head vif_list;
 
         /* power management status cookie from firmware */
         u32 *cookie;
@@ -210,6 +211,9 @@ struct mwl8k_priv {
 
 /* Per interface specific private data */
 struct mwl8k_vif {
+        struct list_head list;
+        struct ieee80211_vif *vif;
+
         /* Non AMPDU sequence number assigned by driver.  */
         u16 seqno;
 };
@@ -3246,7 +3250,7 @@ static void mwl8k_stop(struct ieee80211_hw *hw)
 }
 
 static int mwl8k_add_interface(struct ieee80211_hw *hw,
-                                struct ieee80211_vif *vif)
+                               struct ieee80211_vif *vif)
 {
         struct mwl8k_priv *priv = hw->priv;
         struct mwl8k_vif *mwl8k_vif;
@@ -3254,7 +3258,7 @@ static int mwl8k_add_interface(struct ieee80211_hw *hw,
         /*
          * We only support one active interface at a time.
          */
-        if (priv->vif != NULL)
+        if (!list_empty(&priv->vif_list))
                 return -EBUSY;
 
         /*
@@ -3275,14 +3279,13 @@ static int mwl8k_add_interface(struct ieee80211_hw *hw,
         if (priv->ap_fw)
                 mwl8k_cmd_set_new_stn_add_self(hw, vif);
 
-        /* Clean out driver private area */
+        /* Setup driver private area. */
         mwl8k_vif = MWL8K_VIF(vif);
         memset(mwl8k_vif, 0, sizeof(*mwl8k_vif));
-
-        /* Set Initial sequence number to zero */
+        mwl8k_vif->vif = vif;
         mwl8k_vif->seqno = 0;
 
-        priv->vif = vif;
+        list_add_tail(&mwl8k_vif->list, &priv->vif_list);
 
         return 0;
 }
@@ -3291,13 +3294,14 @@ static void mwl8k_remove_interface(struct ieee80211_hw *hw,
                                    struct ieee80211_vif *vif)
 {
         struct mwl8k_priv *priv = hw->priv;
+        struct mwl8k_vif *mwl8k_vif = MWL8K_VIF(vif);
 
         if (priv->ap_fw)
                 mwl8k_cmd_set_new_stn_del(hw, vif, vif->addr);
 
         mwl8k_cmd_set_mac_addr(hw, "\x00\x00\x00\x00\x00\x00");
 
-        priv->vif = NULL;
+        list_del(&mwl8k_vif->list);
 }
 
 static int mwl8k_config(struct ieee80211_hw *hw, u32 changed)
@@ -3526,7 +3530,7 @@ mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
          * operation, so refuse to enable sniffer mode if a STA
          * interface is active.
          */
-        if (priv->vif != NULL) {
+        if (!list_empty(&priv->vif_list)) {
                 if (net_ratelimit())
                         printk(KERN_INFO "%s: not enabling sniffer "
                                "mode because STA interface is active\n",
@@ -3547,6 +3551,14 @@ mwl8k_configure_filter_sniffer(struct ieee80211_hw *hw,
         return 1;
 }
 
+static struct mwl8k_vif *mwl8k_first_vif(struct mwl8k_priv *priv)
+{
+        if (!list_empty(&priv->vif_list))
+                return list_entry(priv->vif_list.next, struct mwl8k_vif, list);
+
+        return NULL;
+}
+
 static void mwl8k_configure_filter(struct ieee80211_hw *hw,
                                    unsigned int changed_flags,
                                    unsigned int *total_flags,
@@ -3595,6 +3607,7 @@ static void mwl8k_configure_filter(struct ieee80211_hw *hw,
                          */
                         mwl8k_cmd_set_pre_scan(hw);
                 } else {
+                        struct mwl8k_vif *mwl8k_vif;
                         const u8 *bssid;
 
                         /*
@@ -3605,9 +3618,11 @@ static void mwl8k_configure_filter(struct ieee80211_hw *hw,
                          * (where the OUI part needs to be nonzero for
                          * the BSSID to be accepted by POST_SCAN).
                          */
-                        bssid = "\x01\x00\x00\x00\x00\x00";
-                        if (priv->vif != NULL)
-                                bssid = priv->vif->bss_conf.bssid;
+                        mwl8k_vif = mwl8k_first_vif(priv);
+                        if (mwl8k_vif != NULL)
+                                bssid = mwl8k_vif->vif->bss_conf.bssid;
+                        else
+                                bssid = "\x01\x00\x00\x00\x00\x00";
 
                         mwl8k_cmd_set_post_scan(hw, bssid);
                 }
@@ -3810,11 +3825,14 @@ static void mwl8k_finalize_join_worker(struct work_struct *work)
         struct mwl8k_priv *priv =
                 container_of(work, struct mwl8k_priv, finalize_join_worker);
         struct sk_buff *skb = priv->beacon_skb;
+        struct mwl8k_vif *mwl8k_vif;
 
-        mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len,
-                                priv->vif->bss_conf.dtim_period);
-        dev_kfree_skb(skb);
+        mwl8k_vif = mwl8k_first_vif(priv);
+        if (mwl8k_vif != NULL)
+                mwl8k_cmd_finalize_join(priv->hw, skb->data, skb->len,
+                                        mwl8k_vif->vif->bss_conf.dtim_period);
 
+        dev_kfree_skb(skb);
         priv->beacon_skb = NULL;
 }
 
@@ -3986,7 +4004,8 @@ static int __devinit mwl8k_probe(struct pci_dev *pdev,
         hw->flags |= IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_NOISE_DBM;
         hw->vif_data_size = sizeof(struct mwl8k_vif);
         hw->sta_data_size = sizeof(struct mwl8k_sta);
-        priv->vif = NULL;
+
+        INIT_LIST_HEAD(&priv->vif_list);
 
         /* Set default radio state and preamble */
         priv->radio_on = 0;