[MAC80211]: add "invalid" interface type

Since I cannot convince the lazy driver authors (hello Michael)
to stop (ab)using the MGMT interface type internally in their
drivers, this patch introduces a new _INVALID type especially
for their use and changes all affected drivers to use it.

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

drivers/net/wireless/adm8211.c

@@ -1555,7 +1555,7 @@ static void adm8211_stop(struct ieee80211_hw *dev)
 {
 	struct adm8211_priv *priv = dev->priv;
 
-	priv->mode = IEEE80211_IF_TYPE_MGMT;
+	priv->mode = IEEE80211_IF_TYPE_INVALID;
 	priv->nar = 0;
 	ADM8211_CSR_WRITE(NAR, 0);
 	ADM8211_CSR_WRITE(IER, 0);
@@ -1898,7 +1898,7 @@ static int __devinit adm8211_probe(struct pci_dev *pdev,
 	priv->tx_power = 0x40;
 	priv->lpf_cutoff = 0xFF;
 	priv->lnags_threshold = 0xFF;
-	priv->mode = IEEE80211_IF_TYPE_MGMT;
+	priv->mode = IEEE80211_IF_TYPE_INVALID;
 
 	/* Power-on issue. EEPROM won't read correctly without */
 	if (pdev->revision >= ADM8211_REV_BA) {
@@ -1993,7 +1993,7 @@ static int adm8211_suspend(struct pci_dev *pdev, pm_message_t state)
 	struct ieee80211_hw *dev = pci_get_drvdata(pdev);
 	struct adm8211_priv *priv = dev->priv;
 
-	if (priv->mode != IEEE80211_IF_TYPE_MGMT) {
+	if (priv->mode != IEEE80211_IF_TYPE_INVALID) {
 		ieee80211_stop_queues(dev);
 		adm8211_stop(dev);
 	}
@@ -2011,7 +2011,7 @@ static int adm8211_resume(struct pci_dev *pdev)
 	pci_set_power_state(pdev, PCI_D0);
 	pci_restore_state(pdev);
 
-	if (priv->mode != IEEE80211_IF_TYPE_MGMT) {
+	if (priv->mode != IEEE80211_IF_TYPE_INVALID) {
 		adm8211_start(dev);
 		ieee80211_start_queues(dev);
 	}

drivers/net/wireless/p54common.c

@@ -797,7 +797,7 @@ static void p54_stop(struct ieee80211_hw *dev)
 		kfree_skb(skb);
 	}
 	priv->stop(dev);
-	priv->mode = IEEE80211_IF_TYPE_MGMT;
+	priv->mode = IEEE80211_IF_TYPE_INVALID;
 }
 
 static int p54_add_interface(struct ieee80211_hw *dev,
@@ -949,7 +949,7 @@ struct ieee80211_hw *p54_init_common(size_t priv_data_len)
 		return NULL;
 
 	priv = dev->priv;
-	priv->mode = IEEE80211_IF_TYPE_MGMT;
+	priv->mode = IEEE80211_IF_TYPE_INVALID;
 	skb_queue_head_init(&priv->tx_queue);
 	memcpy(priv->channels, p54_channels, sizeof(p54_channels));
 	memcpy(priv->rates, p54_rates, sizeof(p54_rates));

drivers/net/wireless/p54pci.c

@@ -640,7 +640,7 @@ static int p54p_suspend(struct pci_dev *pdev, pm_message_t state)
 	struct ieee80211_hw *dev = pci_get_drvdata(pdev);
 	struct p54p_priv *priv = dev->priv;
 
-	if (priv->common.mode != IEEE80211_IF_TYPE_MGMT) {
+	if (priv->common.mode != IEEE80211_IF_TYPE_INVALID) {
 		ieee80211_stop_queues(dev);
 		p54p_stop(dev);
 	}
@@ -658,7 +658,7 @@ static int p54p_resume(struct pci_dev *pdev)
 	pci_set_power_state(pdev, PCI_D0);
 	pci_restore_state(pdev);
 
-	if (priv->common.mode != IEEE80211_IF_TYPE_MGMT) {
+	if (priv->common.mode != IEEE80211_IF_TYPE_INVALID) {
 		p54p_open(dev);
 		ieee80211_start_queues(dev);
 	}

drivers/net/wireless/rt2x00/rt2x00.h

@@ -297,7 +297,7 @@ struct interface {
 	 * When set to INVALID_INTERFACE, no interface is configured.
 	 */
 	int type;
-#define INVALID_INTERFACE	IEEE80211_IF_TYPE_MGMT
+#define INVALID_INTERFACE	IEEE80211_IF_TYPE_INVALID
 
 	/*
 	 * MAC of the device.

include/net/mac80211.h

@@ -457,6 +457,8 @@ struct ieee80211_conf {
 /**
  * enum ieee80211_if_types - types of 802.11 network interfaces
  *
+ * @IEEE80211_IF_TYPE_INVALID: invalid interface type, not used
+ *	by mac80211 itself
  * @IEEE80211_IF_TYPE_AP: interface in AP mode.
  * @IEEE80211_IF_TYPE_MGMT: special interface for communication with hostap
  *	daemon. Drivers should never see this type.
@@ -468,6 +470,7 @@ struct ieee80211_conf {
  *	will never see this type.
  */
 enum ieee80211_if_types {
+	IEEE80211_IF_TYPE_INVALID,
 	IEEE80211_IF_TYPE_AP,
 	IEEE80211_IF_TYPE_MGMT,
 	IEEE80211_IF_TYPE_STA,

net/mac80211/ieee80211.c

@@ -351,6 +351,10 @@ static int ieee80211_open(struct net_device *dev)
 	case IEEE80211_IF_TYPE_IBSS:
 		/* no special treatment */
 		break;
+	case IEEE80211_IF_TYPE_INVALID:
+		/* cannot happen */
+		WARN_ON(1);
+		break;
 	}
 
 	if (local->open_count == 0) {

net/mac80211/ieee80211_iface.c

@@ -243,6 +243,10 @@ void ieee80211_if_reinit(struct net_device *dev)
 	ieee80211_if_sdata_deinit(sdata);
 
 	switch (sdata->type) {
+	case IEEE80211_IF_TYPE_INVALID:
+		/* cannot happen */
+		WARN_ON(1);
+		break;
 	case IEEE80211_IF_TYPE_MGMT:
 		/* nothing to do */
 		break;

net/mac80211/rx.c

@@ -1453,6 +1453,7 @@ static int prepare_for_handlers(struct ieee80211_sub_if_data *sdata,
 	case IEEE80211_IF_TYPE_MNTR:
 		/* take everything */
 		break;
+	case IEEE80211_IF_TYPE_INVALID:
 	case IEEE80211_IF_TYPE_MGMT:
 		/* should never get here */
 		WARN_ON(1);