staging: wilc1000: avoid the use of 'wilc_wfi_mon' static variable

Avoid use of static variable for monitor net_device and move it inside
wilc structure.
Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wilc1000/linux_mon.c

@@ -18,8 +18,6 @@ struct wilc_wfi_radiotap_cb_hdr {
 	u16 tx_flags;
 } __packed;
 
-static struct net_device *wilc_wfi_mon; /* global monitor netdev */
-
 static u8 srcadd[6];
 static u8 bssid[6];
 
@@ -29,17 +27,17 @@ static u8 bssid[6];
 #define TX_RADIOTAP_PRESENT ((1 << IEEE80211_RADIOTAP_RATE) |	\
 			     (1 << IEEE80211_RADIOTAP_TX_FLAGS))
 
-void wilc_wfi_monitor_rx(u8 *buff, u32 size)
+void wilc_wfi_monitor_rx(struct net_device *mon_dev, u8 *buff, u32 size)
 {
 	u32 header, pkt_offset;
 	struct sk_buff *skb = NULL;
 	struct wilc_wfi_radiotap_hdr *hdr;
 	struct wilc_wfi_radiotap_cb_hdr *cb_hdr;
 
-	if (!wilc_wfi_mon)
+	if (!mon_dev)
 		return;
 
-	if (!netif_running(wilc_wfi_mon))
+	if (!netif_running(mon_dev))
 		return;
 
 	/* Get WILC header */
@@ -94,7 +92,7 @@ void wilc_wfi_monitor_rx(u8 *buff, u32 size)
 		hdr->rate = 5;
 	}
 
-	skb->dev = wilc_wfi_mon;
+	skb->dev = mon_dev;
 	skb_reset_mac_header(skb);
 	skb->ip_summed = CHECKSUM_UNNECESSARY;
 	skb->pkt_type = PACKET_OTHERHOST;
@@ -156,12 +154,10 @@ static netdev_tx_t wilc_wfi_mon_xmit(struct sk_buff *skb,
 	struct sk_buff *skb2;
 	struct wilc_wfi_radiotap_cb_hdr *cb_hdr;
 
-	if (!wilc_wfi_mon)
-		return -EFAULT;
-
-	mon_priv = netdev_priv(wilc_wfi_mon);
+	mon_priv = netdev_priv(dev);
 	if (!mon_priv)
 		return -EFAULT;
+
 	rtap_len = ieee80211_get_radiotap_len(skb->data);
 	if (skb->len < rtap_len)
 		return -1;
@@ -187,7 +183,7 @@ static netdev_tx_t wilc_wfi_mon_xmit(struct sk_buff *skb,
 		cb_hdr->rate = 5;
 		cb_hdr->tx_flags = 0x0004;
 
-		skb2->dev = wilc_wfi_mon;
+		skb2->dev = dev;
 		skb_reset_mac_header(skb2);
 		skb2->ip_summed = CHECKSUM_UNNECESSARY;
 		skb2->pkt_type = PACKET_OTHERHOST;
@@ -223,51 +219,53 @@ static const struct net_device_ops wilc_wfi_netdev_ops = {
 
 };
 
-struct net_device *wilc_wfi_init_mon_interface(const char *name,
+struct net_device *wilc_wfi_init_mon_interface(struct wilc *wl,
+					       const char *name,
 					       struct net_device *real_dev)
 {
 	struct wilc_wfi_mon_priv *priv;
 
 	/*If monitor interface is already initialized, return it*/
-	if (wilc_wfi_mon)
-		return wilc_wfi_mon;
+	if (wl->monitor_dev)
+		return wl->monitor_dev;
 
-	wilc_wfi_mon = alloc_etherdev(sizeof(struct wilc_wfi_mon_priv));
-	if (!wilc_wfi_mon)
+	wl->monitor_dev = alloc_etherdev(sizeof(struct wilc_wfi_mon_priv));
+	if (!wl->monitor_dev)
 		return NULL;
-	wilc_wfi_mon->type = ARPHRD_IEEE80211_RADIOTAP;
-	strncpy(wilc_wfi_mon->name, name, IFNAMSIZ);
-	wilc_wfi_mon->name[IFNAMSIZ - 1] = 0;
-	wilc_wfi_mon->netdev_ops = &wilc_wfi_netdev_ops;
 
-	if (register_netdevice(wilc_wfi_mon)) {
+	wl->monitor_dev->type = ARPHRD_IEEE80211_RADIOTAP;
+	strncpy(wl->monitor_dev->name, name, IFNAMSIZ);
+	wl->monitor_dev->name[IFNAMSIZ - 1] = 0;
+	wl->monitor_dev->netdev_ops = &wilc_wfi_netdev_ops;
+
+	if (register_netdevice(wl->monitor_dev)) {
 		netdev_err(real_dev, "register_netdevice failed\n");
 		return NULL;
 	}
-	priv = netdev_priv(wilc_wfi_mon);
+	priv = netdev_priv(wl->monitor_dev);
 	if (!priv)
 		return NULL;
 
 	priv->real_ndev = real_dev;
 
-	return wilc_wfi_mon;
+	return wl->monitor_dev;
 }
 
-void wilc_wfi_deinit_mon_interface(void)
+void wilc_wfi_deinit_mon_interface(struct wilc *wl)
 {
 	bool rollback_lock = false;
 
-	if (wilc_wfi_mon) {
+	if (wl->monitor_dev) {
 		if (rtnl_is_locked()) {
 			rtnl_unlock();
 			rollback_lock = true;
 		}
-		unregister_netdev(wilc_wfi_mon);
+		unregister_netdev(wl->monitor_dev);
 
 		if (rollback_lock) {
 			rtnl_lock();
 			rollback_lock = false;
 		}
-		wilc_wfi_mon = NULL;
+		wl->monitor_dev = NULL;
 	}
 }

drivers/staging/wilc1000/linux_wlan.c

@@ -920,7 +920,7 @@ static int wilc_mac_close(struct net_device *ndev)
 		netdev_dbg(ndev, "Deinitializing wilc1000\n");
 		wl->close = 1;
 		wilc_wlan_deinitialize(ndev);
-		wilc_wfi_deinit_mon_interface();
+		wilc_wfi_deinit_mon_interface(wl);
 	}
 
 	vif->mac_opened = 0;
@@ -976,7 +976,7 @@ void wilc_wfi_mgmt_rx(struct wilc *wilc, u8 *buff, u32 size)
 	for (i = 0; i < wilc->vif_num; i++) {
 		vif = netdev_priv(wilc->vif[i]->ndev);
 		if (vif->monitor_flag) {
-			wilc_wfi_monitor_rx(buff, size);
+			wilc_wfi_monitor_rx(wilc->monitor_dev, buff, size);
 			return;
 		}
 	}

drivers/staging/wilc1000/wilc_wfi_cfgoperations.c

@@ -1617,7 +1617,8 @@ static struct wireless_dev *add_virtual_intf(struct wiphy *wiphy,
 	struct net_device *new_ifc;
 
 	if (type == NL80211_IFTYPE_MONITOR) {
-		new_ifc = wilc_wfi_init_mon_interface(name, vif->ndev);
+		new_ifc = wilc_wfi_init_mon_interface(vif->wilc, name,
+						      vif->ndev);
 		if (new_ifc) {
 			vif = netdev_priv(priv->wdev->netdev);
 			vif->monitor_flag = 1;

drivers/staging/wilc1000/wilc_wfi_cfgoperations.h

@@ -13,9 +13,10 @@ struct wireless_dev *wilc_create_wiphy(struct net_device *net,
 void wilc_free_wiphy(struct net_device *net);
 void wilc_deinit_host_int(struct net_device *net);
 int wilc_init_host_int(struct net_device *net);
-void wilc_wfi_monitor_rx(u8 *buff, u32 size);
-void wilc_wfi_deinit_mon_interface(void);
-struct net_device *wilc_wfi_init_mon_interface(const char *name,
+void wilc_wfi_monitor_rx(struct net_device *mon_dev, u8 *buff, u32 size);
+void wilc_wfi_deinit_mon_interface(struct wilc *wl);
+struct net_device *wilc_wfi_init_mon_interface(struct wilc *wl,
+					       const char *name,
 					       struct net_device *real_dev);
 void wilc_mgmt_frame_register(struct wiphy *wiphy, struct wireless_dev *wdev,
 			      u16 frame_type, bool reg);

drivers/staging/wilc1000/wilc_wfi_netdevice.h

@@ -270,6 +270,7 @@ struct wilc {
 	enum chip_ps_states chip_ps_state;
 	struct wilc_cfg cfg;
 	void *bus_data;
+	struct net_device *monitor_dev;
 };
 
 struct wilc_wfi_mon_priv {