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

16 files changed, 165 insertions, 69 deletions

diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index 42844d7b154af..bfd1590821d62 100644
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -29,6 +29,8 @@
 #include <net/sock.h>
 #include <linux/seq_file.h>
 
+#define BT_SUBSYS_VERSION "2.21"
+
 #ifndef AF_BLUETOOTH
 #define AF_BLUETOOTH	31
 #define PF_BLUETOOTH	AF_BLUETOOTH
@@ -296,12 +298,17 @@ typedef void (*hci_req_complete_t)(struct hci_dev *hdev, u8 status, u16 opcode);
 typedef void (*hci_req_complete_skb_t)(struct hci_dev *hdev, u8 status,
 				       u16 opcode, struct sk_buff *skb);
 
+#define HCI_REQ_START	BIT(0)
+#define HCI_REQ_SKB	BIT(1)
+
 struct hci_ctrl {
 	__u16 opcode;
-	bool req_start;
+	u8 req_flags;
 	u8 req_event;
-	hci_req_complete_t req_complete;
-	hci_req_complete_skb_t req_complete_skb;
+	union {
+		hci_req_complete_t req_complete;
+		hci_req_complete_skb_t req_complete_skb;
+	};
 };
 
 struct bt_skb_cb {
@@ -316,15 +323,17 @@ struct bt_skb_cb {
 };
 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
 
+#define hci_skb_pkt_type(skb) bt_cb((skb))->pkt_type
+#define hci_skb_expect(skb) bt_cb((skb))->expect
+#define hci_skb_opcode(skb) bt_cb((skb))->hci.opcode
+
 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
 {
 	struct sk_buff *skb;
 
 	skb = alloc_skb(len + BT_SKB_RESERVE, how);
-	if (skb) {
+	if (skb)
 		skb_reserve(skb, BT_SKB_RESERVE);
-		bt_cb(skb)->incoming  = 0;
-	}
 	return skb;
 }
 
@@ -334,10 +343,8 @@ static inline struct sk_buff *bt_skb_send_alloc(struct sock *sk,
 	struct sk_buff *skb;
 
 	skb = sock_alloc_send_skb(sk, len + BT_SKB_RESERVE, nb, err);
-	if (skb) {
+	if (skb)
 		skb_reserve(skb, BT_SKB_RESERVE);
-		bt_cb(skb)->incoming  = 0;
-	}
 
 	if (!skb && *err)
 		return NULL;
diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index 0205b80cc90b2..cc22167276555 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -452,7 +452,8 @@ enum {
 #define HCI_ERROR_REMOTE_POWER_OFF	0x15
 #define HCI_ERROR_LOCAL_HOST_TERM	0x16
 #define HCI_ERROR_PAIRING_NOT_ALLOWED	0x18
-#define HCI_ERROR_INVALID_LL_PARAMS	0x1E
+#define HCI_ERROR_INVALID_LL_PARAMS	0x1e
+#define HCI_ERROR_UNSPECIFIED		0x1f
 #define HCI_ERROR_ADVERTISING_TIMEOUT	0x3c
 
 /* Flow control modes */
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 1878d0a96333c..55ce209157b10 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -327,6 +327,11 @@ struct hci_dev {
 	struct work_struct	cmd_work;
 	struct work_struct	tx_work;
 
+	struct work_struct	discov_update;
+	struct work_struct	bg_scan_update;
+	struct delayed_work	le_scan_disable;
+	struct delayed_work	le_scan_restart;
+
 	struct sk_buff_head	rx_q;
 	struct sk_buff_head	raw_q;
 	struct sk_buff_head	cmd_q;
@@ -370,9 +375,6 @@ struct hci_dev {
 
 	DECLARE_BITMAP(dev_flags, __HCI_NUM_FLAGS);
 
-	struct delayed_work	le_scan_disable;
-	struct delayed_work	le_scan_restart;
-
 	__s8			adv_tx_power;
 	__u8			adv_data[HCI_MAX_AD_LENGTH];
 	__u8			adv_data_len;
@@ -875,7 +877,7 @@ struct hci_chan *hci_chan_lookup_handle(struct hci_dev *hdev, __u16 handle);
 
 struct hci_conn *hci_connect_le_scan(struct hci_dev *hdev, bdaddr_t *dst,
 				     u8 dst_type, u8 sec_level,
-				     u16 conn_timeout, u8 role);
+				     u16 conn_timeout);
 struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 				u8 dst_type, u8 sec_level, u16 conn_timeout,
 				u8 role);
@@ -1036,7 +1038,6 @@ struct hci_conn_params *hci_conn_params_lookup(struct hci_dev *hdev,
 struct hci_conn_params *hci_conn_params_add(struct hci_dev *hdev,
 					    bdaddr_t *addr, u8 addr_type);
 void hci_conn_params_del(struct hci_dev *hdev, bdaddr_t *addr, u8 addr_type);
-void hci_conn_params_clear_all(struct hci_dev *hdev);
 void hci_conn_params_clear_disabled(struct hci_dev *hdev);
 
 struct hci_conn_params *hci_pend_le_action_lookup(struct list_head *list,
@@ -1473,6 +1474,8 @@ void mgmt_ssp_enable_complete(struct hci_dev *hdev, u8 enable, u8 status);
 void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
 				    u8 status);
 void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status);
+void mgmt_start_discovery_complete(struct hci_dev *hdev, u8 status);
+void mgmt_stop_discovery_complete(struct hci_dev *hdev, u8 status);
 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 		       u8 addr_type, u8 *dev_class, s8 rssi, u32 flags,
 		       u8 *eir, u16 eir_len, u8 *scan_rsp, u8 scan_rsp_len);
diff --git a/include/net/bluetooth/hci_mon.h b/include/net/bluetooth/hci_mon.h
index 2b67567cf28d6..587d0131b349a 100644
--- a/include/net/bluetooth/hci_mon.h
+++ b/include/net/bluetooth/hci_mon.h
@@ -43,6 +43,8 @@ struct hci_mon_hdr {
 #define HCI_MON_CLOSE_INDEX	9
 #define HCI_MON_INDEX_INFO	10
 #define HCI_MON_VENDOR_DIAG	11
+#define HCI_MON_SYSTEM_NOTE	12
+#define HCI_MON_USER_LOGGING	13
 
 struct hci_mon_new_index {
 	__u8		type;
diff --git a/include/net/bluetooth/hci_sock.h b/include/net/bluetooth/hci_sock.h
index 9a46d665c1b50..8e9138acdae14 100644
--- a/include/net/bluetooth/hci_sock.h
+++ b/include/net/bluetooth/hci_sock.h
@@ -45,6 +45,7 @@ struct sockaddr_hci {
 #define HCI_CHANNEL_USER	1
 #define HCI_CHANNEL_MONITOR	2
 #define HCI_CHANNEL_CONTROL	3
+#define HCI_CHANNEL_LOGGING	4
 
 struct hci_filter {
 	unsigned long type_mask;
diff --git a/include/net/bluetooth/mgmt.h b/include/net/bluetooth/mgmt.h
index b831242d48a4b..af17774c9416c 100644
--- a/include/net/bluetooth/mgmt.h
+++ b/include/net/bluetooth/mgmt.h
@@ -571,6 +571,19 @@ struct mgmt_rp_remove_advertising {
 	__u8	instance;
 } __packed;
 
+#define MGMT_OP_GET_ADV_SIZE_INFO	0x0040
+struct mgmt_cp_get_adv_size_info {
+	__u8	instance;
+	__le32	flags;
+} __packed;
+#define MGMT_GET_ADV_SIZE_INFO_SIZE	5
+struct mgmt_rp_get_adv_size_info {
+	__u8	instance;
+	__le32	flags;
+	__u8	max_adv_data_len;
+	__u8	max_scan_rsp_len;
+} __packed;
+
 #define MGMT_EV_CMD_COMPLETE		0x0001
 struct mgmt_ev_cmd_complete {
 	__le16	opcode;
diff --git a/include/net/busy_poll.h b/include/net/busy_poll.h
index 1d67fb6b23a04..2fbeb1313c0f4 100644
--- a/include/net/busy_poll.h
+++ b/include/net/busy_poll.h
@@ -72,50 +72,7 @@ static inline bool busy_loop_timeout(unsigned long end_time)
 	return time_after(now, end_time);
 }
 
-/* when used in sock_poll() nonblock is known at compile time to be true
- * so the loop and end_time will be optimized out
- */
-static inline bool sk_busy_loop(struct sock *sk, int nonblock)
-{
-	unsigned long end_time = !nonblock ? sk_busy_loop_end_time(sk) : 0;
-	const struct net_device_ops *ops;
-	struct napi_struct *napi;
-	int rc = false;
-
-	/*
-	 * rcu read lock for napi hash
-	 * bh so we don't race with net_rx_action
-	 */
-	rcu_read_lock_bh();
-
-	napi = napi_by_id(sk->sk_napi_id);
-	if (!napi)
-		goto out;
-
-	ops = napi->dev->netdev_ops;
-	if (!ops->ndo_busy_poll)
-		goto out;
-
-	do {
-		rc = ops->ndo_busy_poll(napi);
-
-		if (rc == LL_FLUSH_FAILED)
-			break; /* permanent failure */
-
-		if (rc > 0)
-			/* local bh are disabled so it is ok to use _BH */
-			NET_ADD_STATS_BH(sock_net(sk),
-					 LINUX_MIB_BUSYPOLLRXPACKETS, rc);
-		cpu_relax();
-
-	} while (!nonblock && skb_queue_empty(&sk->sk_receive_queue) &&
-		 !need_resched() && !busy_loop_timeout(end_time));
-
-	rc = !skb_queue_empty(&sk->sk_receive_queue);
-out:
-	rcu_read_unlock_bh();
-	return rc;
-}
+bool sk_busy_loop(struct sock *sk, int nonblock);
 
 /* used in the NIC receive handler to mark the skb */
 static inline void skb_mark_napi_id(struct sk_buff *skb,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 2c7bdb81d30c8..9bcaaf7cd15ab 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -2321,6 +2321,8 @@ struct cfg80211_qos_map {
  *	the driver, and will be valid until passed to cfg80211_scan_done().
  *	For scan results, call cfg80211_inform_bss(); you can call this outside
  *	the scan/scan_done bracket too.
+ * @abort_scan: Tell the driver to abort an ongoing scan. The driver shall
+ *	indicate the status of the scan through cfg80211_scan_done().
  *
  * @auth: Request to authenticate with the specified peer
  *	(invoked with the wireless_dev mutex held)
@@ -2593,6 +2595,7 @@ struct cfg80211_ops {
 
 	int	(*scan)(struct wiphy *wiphy,
 			struct cfg80211_scan_request *request);
+	void	(*abort_scan)(struct wiphy *wiphy, struct wireless_dev *wdev);
 
 	int	(*auth)(struct wiphy *wiphy, struct net_device *dev,
 			struct cfg80211_auth_request *req);
@@ -5173,8 +5176,11 @@ size_t ieee80211_ie_split_ric(const u8 *ies, size_t ielen,
  * buffer starts, which may be @ielen if the entire (remainder)
  * of the buffer should be used.
  */
-size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
-			  const u8 *ids, int n_ids, size_t offset);
+static inline size_t ieee80211_ie_split(const u8 *ies, size_t ielen,
+					const u8 *ids, int n_ids, size_t offset)
+{
+	return ieee80211_ie_split_ric(ies, ielen, ids, n_ids, NULL, 0, offset);
+}
 
 /**
  * cfg80211_report_wowlan_wakeup - report wakeup from WoWLAN
diff --git a/include/net/dsa.h b/include/net/dsa.h
index 82a4c60111733..3f23dd9d6a692 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -16,6 +16,7 @@
 #include <linux/timer.h>
 #include <linux/workqueue.h>
 #include <linux/of.h>
+#include <linux/of_gpio.h>
 #include <linux/phy.h>
 #include <linux/phy_fixed.h>
 #include <linux/ethtool.h>
@@ -64,6 +65,13 @@ struct dsa_chip_data {
 	 * NULL if there is only one switch chip.
 	 */
 	s8		*rtable;
+
+	/*
+	 * A switch may have a GPIO line tied to its reset pin. Parse
+	 * this from the device tree, and use it before performing
+	 * switch soft reset.
+	 */
+	struct gpio_desc *reset;
 };
 
 struct dsa_platform_data {
diff --git a/include/net/ip6_fib.h b/include/net/ip6_fib.h
index aaf9700fc9e5f..fb961a576abe4 100644
--- a/include/net/ip6_fib.h
+++ b/include/net/ip6_fib.h
@@ -167,7 +167,8 @@ static inline void rt6_update_expires(struct rt6_info *rt0, int timeout)
 
 static inline u32 rt6_get_cookie(const struct rt6_info *rt)
 {
-	if (rt->rt6i_flags & RTF_PCPU || unlikely(rt->dst.flags & DST_NOCACHE))
+	if (rt->rt6i_flags & RTF_PCPU ||
+	    (unlikely(rt->dst.flags & DST_NOCACHE) && rt->dst.from))
 		rt = (struct rt6_info *)(rt->dst.from);
 
 	return rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0;
diff --git a/include/net/ip6_tunnel.h b/include/net/ip6_tunnel.h
index aaee6fa02cf1d..ff788b665277d 100644
--- a/include/net/ip6_tunnel.h
+++ b/include/net/ip6_tunnel.h
@@ -90,11 +90,12 @@ static inline void ip6tunnel_xmit(struct sock *sk, struct sk_buff *skb,
 	err = ip6_local_out(dev_net(skb_dst(skb)->dev), sk, skb);
 
 	if (net_xmit_eval(err) == 0) {
-		struct pcpu_sw_netstats *tstats = this_cpu_ptr(dev->tstats);
+		struct pcpu_sw_netstats *tstats = get_cpu_ptr(dev->tstats);
 		u64_stats_update_begin(&tstats->syncp);
 		tstats->tx_bytes += pkt_len;
 		tstats->tx_packets++;
 		u64_stats_update_end(&tstats->syncp);
+		put_cpu_ptr(tstats);
 	} else {
 		stats->tx_errors++;
 		stats->tx_aborted_errors++;
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index f6dafec9102c5..62a750a6a8f8c 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -287,12 +287,13 @@ static inline void iptunnel_xmit_stats(int err,
 				       struct pcpu_sw_netstats __percpu *stats)
 {
 	if (err > 0) {
-		struct pcpu_sw_netstats *tstats = this_cpu_ptr(stats);
+		struct pcpu_sw_netstats *tstats = get_cpu_ptr(stats);
 
 		u64_stats_update_begin(&tstats->syncp);
 		tstats->tx_bytes += err;
 		tstats->tx_packets++;
 		u64_stats_update_end(&tstats->syncp);
+		put_cpu_ptr(tstats);
 	} else if (err < 0) {
 		err_stats->tx_errors++;
 		err_stats->tx_aborted_errors++;
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 82045fca388b2..7c30faff245f2 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1321,11 +1321,15 @@ struct ieee80211_channel_switch {
  *	interface. This flag should be set during interface addition,
  *	but may be set/cleared as late as authentication to an AP. It is
  *	only valid for managed/station mode interfaces.
+ * @IEEE80211_VIF_GET_NOA_UPDATE: request to handle NOA attributes
+ *	and send P2P_PS notification to the driver if NOA changed, even
+ *	this is not pure P2P vif.
  */
 enum ieee80211_vif_flags {
 	IEEE80211_VIF_BEACON_FILTER		= BIT(0),
 	IEEE80211_VIF_SUPPORTS_CQM_RSSI		= BIT(1),
 	IEEE80211_VIF_SUPPORTS_UAPSD		= BIT(2),
+	IEEE80211_VIF_GET_NOA_UPDATE		= BIT(3),
 };
 
 /**
@@ -1901,6 +1905,11 @@ struct ieee80211_txq {
  * @IEEE80211_HW_BEACON_TX_STATUS: The device/driver provides TX status
  *	for sent beacons.
  *
+ * @IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR: Hardware (or driver) requires that each
+ *	station has a unique address, i.e. each station entry can be identified
+ *	by just its MAC address; this prevents, for example, the same station
+ *	from connecting to two virtual AP interfaces at the same time.
+ *
  * @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays
  */
 enum ieee80211_hw_flags {
@@ -1936,6 +1945,7 @@ enum ieee80211_hw_flags {
 	IEEE80211_HW_TDLS_WIDER_BW,
 	IEEE80211_HW_SUPPORTS_AMSDU_IN_AMPDU,
 	IEEE80211_HW_BEACON_TX_STATUS,
+	IEEE80211_HW_NEEDS_UNIQUE_STA_ADDR,
 
 	/* keep last, obviously */
 	NUM_IEEE80211_HW_FLAGS
@@ -2003,8 +2013,10 @@ enum ieee80211_hw_flags {
  *	it shouldn't be set.
  *
  * @max_tx_aggregation_subframes: maximum number of subframes in an
- *	aggregate an HT driver will transmit, used by the peer as a
- *	hint to size its reorder buffer.
+ *	aggregate an HT driver will transmit. Though ADDBA will advertise
+ *	a constant value of 64 as some older APs can crash if the window
+ *	size is smaller (an example is LinkSys WRT120N with FW v1.0.07
+ *	build 002 Jun 18 2012).
  *
  * @offchannel_tx_hw_queue: HW queue ID to use for offchannel TX
  *	(if %IEEE80211_HW_QUEUE_CONTROL is set)
@@ -4861,6 +4873,28 @@ void ieee80211_sta_block_awake(struct ieee80211_hw *hw,
 void ieee80211_sta_eosp(struct ieee80211_sta *pubsta);
 
 /**
+ * ieee80211_send_eosp_nullfunc - ask mac80211 to send NDP with EOSP
+ * @pubsta: the station
+ * @tid: the tid of the NDP
+ *
+ * Sometimes the device understands that it needs to close
+ * the Service Period unexpectedly. This can happen when
+ * sending frames that are filling holes in the BA window.
+ * In this case, the device can ask mac80211 to send a
+ * Nullfunc frame with EOSP set. When that happens, the
+ * driver must have called ieee80211_sta_set_buffered() to
+ * let mac80211 know that there are no buffered frames any
+ * more, otherwise mac80211 will get the more_data bit wrong.
+ * The low level driver must have made sure that the frame
+ * will be sent despite the station being in power-save.
+ * Mac80211 won't call allow_buffered_frames().
+ * Note that calling this function, doesn't exempt the driver
+ * from closing the EOSP properly, it will still have to call
+ * ieee80211_sta_eosp when the NDP is sent.
+ */
+void ieee80211_send_eosp_nullfunc(struct ieee80211_sta *pubsta, int tid);
+
+/**
  * ieee80211_iter_keys - iterate keys programmed into the device
  * @hw: pointer obtained from ieee80211_alloc_hw()
  * @vif: virtual interface to iterate, may be %NULL for all
@@ -4888,6 +4922,30 @@ void ieee80211_iter_keys(struct ieee80211_hw *hw,
 			 void *iter_data);
 
 /**
+ * ieee80211_iter_keys_rcu - iterate keys programmed into the device
+ * @hw: pointer obtained from ieee80211_alloc_hw()
+ * @vif: virtual interface to iterate, may be %NULL for all
+ * @iter: iterator function that will be called for each key
+ * @iter_data: custom data to pass to the iterator function
+ *
+ * This function can be used to iterate all the keys known to
+ * mac80211, even those that weren't previously programmed into
+ * the device. Note that due to locking reasons, keys of station
+ * in removal process will be skipped.
+ *
+ * This function requires being called in an RCU critical section,
+ * and thus iter must be atomic.
+ */
+void ieee80211_iter_keys_rcu(struct ieee80211_hw *hw,
+			     struct ieee80211_vif *vif,
+			     void (*iter)(struct ieee80211_hw *hw,
+					  struct ieee80211_vif *vif,
+					  struct ieee80211_sta *sta,
+					  struct ieee80211_key_conf *key,
+					  void *data),
+			     void *iter_data);
+
+/**
  * ieee80211_iter_chan_contexts_atomic - iterate channel contexts
  * @hw: pointre obtained from ieee80211_alloc_hw().
  * @iter: iterator function
diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index c9149cc0a02d3..4bd7508bedc9f 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -618,6 +618,8 @@ struct nft_expr_ops {
 	void				(*eval)(const struct nft_expr *expr,
 						struct nft_regs *regs,
 						const struct nft_pktinfo *pkt);
+	int				(*clone)(struct nft_expr *dst,
+						 const struct nft_expr *src);
 	unsigned int			size;
 
 	int				(*init)(const struct nft_ctx *ctx,
@@ -660,10 +662,20 @@ void nft_expr_destroy(const struct nft_ctx *ctx, struct nft_expr *expr);
 int nft_expr_dump(struct sk_buff *skb, unsigned int attr,
 		  const struct nft_expr *expr);
 
-static inline void nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
+static inline int nft_expr_clone(struct nft_expr *dst, struct nft_expr *src)
 {
+	int err;
+
 	__module_get(src->ops->type->owner);
-	memcpy(dst, src, src->ops->size);
+	if (src->ops->clone) {
+		dst->ops = src->ops;
+		err = src->ops->clone(dst, src);
+		if (err < 0)
+			return err;
+	} else {
+		memcpy(dst, src, src->ops->size);
+	}
+	return 0;
 }
 
 /**
diff --git a/include/net/sock.h b/include/net/sock.h
index bbf7c2cf15b4e..7f89e4ba18d11 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2226,6 +2226,31 @@ static inline bool sk_listener(const struct sock *sk)
 	return (1 << sk->sk_state) & (TCPF_LISTEN | TCPF_NEW_SYN_RECV);
 }
 
+/**
+ * sk_state_load - read sk->sk_state for lockless contexts
+ * @sk: socket pointer
+ *
+ * Paired with sk_state_store(). Used in places we do not hold socket lock :
+ * tcp_diag_get_info(), tcp_get_info(), tcp_poll(), get_tcp4_sock() ...
+ */
+static inline int sk_state_load(const struct sock *sk)
+{
+	return smp_load_acquire(&sk->sk_state);
+}
+
+/**
+ * sk_state_store - update sk->sk_state
+ * @sk: socket pointer
+ * @newstate: new state
+ *
+ * Paired with sk_state_load(). Should be used in contexts where
+ * state change might impact lockless readers.
+ */
+static inline void sk_state_store(struct sock *sk, int newstate)
+{
+	smp_store_release(&sk->sk_state, newstate);
+}
+
 void sock_enable_timestamp(struct sock *sk, int flag);
 int sock_get_timestamp(struct sock *, struct timeval __user *);
 int sock_get_timestampns(struct sock *, struct timespec __user *);
diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index bc865e244efea..1d22ce9f352e2 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -323,7 +323,7 @@ static inline int switchdev_port_fdb_dump(struct sk_buff *skb,
 					  struct net_device *filter_dev,
 					  int idx)
 {
-	return -EOPNOTSUPP;
+       return idx;
 }
 
 static inline void switchdev_port_fwd_mark_set(struct net_device *dev,