Merge tag 'mac80211-next-for-davem-2015-12-07' into next

This pull request got a bit bigger than I wanted, due to
needing to reshuffle and fix some bugs. I merged mac80211
to get the right base for some of these changes.

 * new mac80211 API for upcoming driver changes: EOSP handling,
   key iteration
 * scan abort changes allowing to cancel an ongoing scan
 * VHT IBSS 80+80 MHz support
 * re-enable full AP client state tracking after fixes
 * various small fixes (that weren't relevant for mac80211)
 * various cleanups

1 files changed, 52 insertions, 24 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index d20891465247..7d2d1d7aaec7 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -326,7 +326,8 @@ enum {
 	NAPI_STATE_SCHED,	/* Poll is scheduled */
 	NAPI_STATE_DISABLE,	/* Disable pending */
 	NAPI_STATE_NPSVC,	/* Netpoll - don't dequeue from poll_list */
-	NAPI_STATE_HASHED,	/* In NAPI hash */
+	NAPI_STATE_HASHED,	/* In NAPI hash (busy polling possible) */
+	NAPI_STATE_NO_BUSY_POLL,/* Do not add in napi_hash, no busy polling */
 };
 
 enum gro_result {
@@ -461,19 +462,13 @@ static inline void napi_complete(struct napi_struct *n)
 }
 
 /**
- *	napi_by_id - lookup a NAPI by napi_id
- *	@napi_id: hashed napi_id
- *
- * lookup @napi_id in napi_hash table
- * must be called under rcu_read_lock()
- */
-struct napi_struct *napi_by_id(unsigned int napi_id);
-
-/**
  *	napi_hash_add - add a NAPI to global hashtable
  *	@napi: napi context
  *
  * generate a new napi_id and store a @napi under it in napi_hash
+ * Used for busy polling (CONFIG_NET_RX_BUSY_POLL)
+ * Note: This is normally automatically done from netif_napi_add(),
+ * so might disappear in a future linux version.
  */
 void napi_hash_add(struct napi_struct *napi);
 
@@ -482,9 +477,14 @@ void napi_hash_add(struct napi_struct *napi);
  *	@napi: napi context
  *
  * Warning: caller must observe rcu grace period
- * before freeing memory containing @napi
+ * before freeing memory containing @napi, if
+ * this function returns true.
+ * Note: core networking stack automatically calls it
+ * from netif_napi_del()
+ * Drivers might want to call this helper to combine all
+ * the needed rcu grace periods into a single one.
  */
-void napi_hash_del(struct napi_struct *napi);
+bool napi_hash_del(struct napi_struct *napi);
 
 /**
  *	napi_disable - prevent NAPI from scheduling
@@ -1948,6 +1948,26 @@ void netif_napi_add(struct net_device *dev, struct napi_struct *napi,
 		    int (*poll)(struct napi_struct *, int), int weight);
 
 /**
+ *	netif_tx_napi_add - initialize a napi context
+ *	@dev:  network device
+ *	@napi: napi context
+ *	@poll: polling function
+ *	@weight: default weight
+ *
+ * This variant of netif_napi_add() should be used from drivers using NAPI
+ * to exclusively poll a TX queue.
+ * This will avoid we add it into napi_hash[], thus polluting this hash table.
+ */
+static inline void netif_tx_napi_add(struct net_device *dev,
+				     struct napi_struct *napi,
+				     int (*poll)(struct napi_struct *, int),
+				     int weight)
+{
+	set_bit(NAPI_STATE_NO_BUSY_POLL, &napi->state);
+	netif_napi_add(dev, napi, poll, weight);
+}
+
+/**
  *  netif_napi_del - remove a napi context
  *  @napi: napi context
  *
@@ -2068,20 +2088,23 @@ struct pcpu_sw_netstats {
 	struct u64_stats_sync   syncp;
 };
 
-#define netdev_alloc_pcpu_stats(type)				\
-({								\
-	typeof(type) __percpu *pcpu_stats = alloc_percpu(type); \
-	if (pcpu_stats)	{					\
-		int __cpu;					\
-		for_each_possible_cpu(__cpu) {			\
-			typeof(type) *stat;			\
-			stat = per_cpu_ptr(pcpu_stats, __cpu);	\
-			u64_stats_init(&stat->syncp);		\
-		}						\
-	}							\
-	pcpu_stats;						\
+#define __netdev_alloc_pcpu_stats(type, gfp)				\
+({									\
+	typeof(type) __percpu *pcpu_stats = alloc_percpu_gfp(type, gfp);\
+	if (pcpu_stats)	{						\
+		int __cpu;						\
+		for_each_possible_cpu(__cpu) {				\
+			typeof(type) *stat;				\
+			stat = per_cpu_ptr(pcpu_stats, __cpu);		\
+			u64_stats_init(&stat->syncp);			\
+		}							\
+	}								\
+	pcpu_stats;							\
 })
 
+#define netdev_alloc_pcpu_stats(type)					\
+	__netdev_alloc_pcpu_stats(type, GFP_KERNEL);
+
 #include <linux/notifier.h>
 
 /* netdevice notifier chain. Please remember to update the rtnetlink
@@ -3854,6 +3877,11 @@ static inline bool netif_is_bridge_master(const struct net_device *dev)
 	return dev->priv_flags & IFF_EBRIDGE;
 }
 
+static inline bool netif_is_bridge_port(const struct net_device *dev)
+{
+	return dev->priv_flags & IFF_BRIDGE_PORT;
+}
+
 static inline bool netif_is_ovs_master(const struct net_device *dev)
 {
 	return dev->priv_flags & IFF_OPENVSWITCH;