mac802154: move local started handling

This patch removes the current handling of started boolean. This is
actually dead code, because mac802154_netdev_register can't never be
called before ieee802154_register_hw. This means that local->started is
always be true when mac802154_netdev_register is called. Instead we
using this now like mac80211 to indicate that an instance of sdata is
running.
Signed-off-by: NAlexander Aring <alex.aring@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

net/mac802154/driver-ops.h

@@ -29,6 +29,8 @@ static inline int drv_start(struct ieee802154_local *local)
 {
 	might_sleep();
 
+	local->started = true;
+
 	return local->ops->start(&local->hw);
 }
 
@@ -37,6 +39,8 @@ static inline void drv_stop(struct ieee802154_local *local)
 	might_sleep();
 
 	local->ops->stop(&local->hw);
+
+	local->started = false;
 }
 
 static inline int drv_set_channel(struct ieee802154_local *local,

net/mac802154/ieee802154_i.h

@@ -50,19 +50,12 @@ struct ieee802154_local {
 	 */
 	struct workqueue_struct	*workqueue;
 
-	/* SoftMAC device is registered and running. One can add subinterfaces.
-	 * This flag should be modified under slaves_mtx and RTNL, so you can
-	 * read them using any of protection methods.
-	 */
 	bool started;
 
 	struct tasklet_struct tasklet;
 	struct sk_buff_head skb_queue;
 };
 
-#define	MAC802154_DEVICE_STOPPED	0x00
-#define MAC802154_DEVICE_RUN		0x01
-
 enum {
 	IEEE802154_RX_MSG        = 1,
 };

net/mac802154/main.c

@@ -46,13 +46,6 @@ mac802154_netdev_register(struct wpan_phy *phy, struct net_device *dev)
 
 	SET_NETDEV_DEV(dev, &local->phy->dev);
 
-	mutex_lock(&local->iflist_mtx);
-	if (!local->started) {
-		mutex_unlock(&local->iflist_mtx);
-		return -ENODEV;
-	}
-	mutex_unlock(&local->iflist_mtx);
-
 	err = register_netdev(dev);
 	if (err < 0)
 		return err;
@@ -235,14 +228,6 @@ int ieee802154_register_hw(struct ieee802154_hw *hw)
 	if (rc < 0)
 		goto out_wq;
 
-	rtnl_lock();
-
-	mutex_lock(&local->iflist_mtx);
-	local->started = MAC802154_DEVICE_RUN;
-	mutex_unlock(&local->iflist_mtx);
-
-	rtnl_unlock();
-
 	return 0;
 
 out_wq:
@@ -263,10 +248,6 @@ void ieee802154_unregister_hw(struct ieee802154_hw *hw)
 
 	rtnl_lock();
 
-	mutex_lock(&local->iflist_mtx);
-	local->started = MAC802154_DEVICE_STOPPED;
-	mutex_unlock(&local->iflist_mtx);
-
 	list_for_each_entry_safe(sdata, next, &local->interfaces, list) {
 		mutex_lock(&sdata->local->iflist_mtx);
 		list_del(&sdata->list);