Merge branch 'for-davem' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next

John W. Linville says:

====================
pull request: wireless-next 2014-05-02

Please pull this batch of updates intended for the 3.16 stream...

For the mac80211 bits, Johannes says:

"In this round we have a large number of small features and
improvements from people too numerous to list here. The only really
bit thing is Michał and Luca's CSA work (including changing how
interface combination verification is done)."

For the Bluetooth bits, Gustavo says:

"Here goes some patches for the -next release. There is nothing
really special for this pull request, just a bunch of refactors,
fixes and clean ups."

For the ath10k/ath6kl bits, Kalle says:

"For ath6kl Kalle fixed a bunch of checkpatch warnings.

In ath10k we had more changes, major ones being:

* fix memory allocation failures after a firmware crash (Michal)

* some rework of DFS configuration to enable it correctly in all cases
  (Michal)

* add a new firmware crash option to make it possible to crash 10.1
  firmware for testing purposes (Marek P)

* fix RTS/CTS protection in certain cases (Marek K)

* fix wrong RSSI and rate reporting in some cases (Janusz)

* fix firmware stats reporting (Chun, Ben & Bartosz)"

For the iwlwifi bits, Emmanuel says:

"I have here a bunch of unrelated things. I disabled support for
-7.ucode which means that I can removed a lot of code. Eliad has
a brand new feature: we reduce the Tx power when the link allows -
this reduces our power consumption. The regular changes in power and
scan area. One interesting thing though is the patches from Johannes,
we have now GRO which allows to increase our throughput in TCP Rx. The
main advantage is that it reduces the number of TCP Acks - these TCP
Acks are completely useless when we are using A-MPDU since the first
packet of the A-MPDU generates a TCP Ack which is made obsolete by
the next packets."

Along with that, there are a variety of updates to b43, mwifiex,
rtl8180 and wil6210 drivers and a handful of other updates here
and there.

Please let me know if there are problems!
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 162 insertions, 17 deletions

diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index be150cf8cd43..4261a67682c0 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -367,6 +367,7 @@ 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_ADVERTISING_TIMEOUT	0x3c
 
 /* Flow control modes */
 #define HCI_FLOW_CTL_MODE_PACKET_BASED	0x00
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 5f8bc05694ac..d73f41855ada 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -68,6 +68,11 @@ struct discovery_state {
 	struct list_head	unknown;	/* Name state not known */
 	struct list_head	resolve;	/* Name needs to be resolved */
 	__u32			timestamp;
+	bdaddr_t		last_adv_addr;
+	u8			last_adv_addr_type;
+	s8			last_adv_rssi;
+	u8			last_adv_data[HCI_MAX_AD_LENGTH];
+	u8			last_adv_data_len;
 };
 
 struct hci_conn_hash {
@@ -194,6 +199,7 @@ struct hci_dev {
 	__u16		le_scan_window;
 	__u16		le_conn_min_interval;
 	__u16		le_conn_max_interval;
+	__u16		discov_interleaved_timeout;
 	__u8		ssp_debug_mode;
 
 	__u16		devid_source;
@@ -1204,8 +1210,8 @@ void hci_sock_dev_event(struct hci_dev *hdev, int event);
  */
 #define DISCOV_LE_SCAN_WIN		0x12
 #define DISCOV_LE_SCAN_INT		0x12
-#define DISCOV_LE_TIMEOUT		msecs_to_jiffies(10240)
-#define DISCOV_INTERLEAVED_TIMEOUT	msecs_to_jiffies(5120)
+#define DISCOV_LE_TIMEOUT		10240	/* msec */
+#define DISCOV_INTERLEAVED_TIMEOUT	5120	/* msec */
 #define DISCOV_INTERLEAVED_INQUIRY_LEN	0x04
 #define DISCOV_BREDR_INQUIRY_LEN	0x08
 
@@ -1265,7 +1271,8 @@ void mgmt_read_local_oob_data_complete(struct hci_dev *hdev, u8 *hash192,
 				       u8 *randomizer256, u8 status);
 void mgmt_device_found(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 		       u8 addr_type, u8 *dev_class, s8 rssi, u8 cfm_name,
-		       u8 ssp, u8 *eir, u16 eir_len);
+		       u8 ssp, u8 *eir, u16 eir_len, u8 *scan_rsp,
+		       u8 scan_rsp_len);
 void mgmt_remote_name(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 link_type,
 		      u8 addr_type, s8 rssi, u8 *name, u8 name_len);
 void mgmt_discovering(struct hci_dev *hdev, u8 discovering);
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index f3539a15c411..7eae46ccec01 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -109,6 +109,13 @@ enum ieee80211_band {
  *	channel as the control or any of the secondary channels.
  *	This may be due to the driver or due to regulatory bandwidth
  *	restrictions.
+ * @IEEE80211_CHAN_INDOOR_ONLY: see %NL80211_FREQUENCY_ATTR_INDOOR_ONLY
+ * @IEEE80211_CHAN_GO_CONCURRENT: see %NL80211_FREQUENCY_ATTR_GO_CONCURRENT
+ * @IEEE80211_CHAN_NO_20MHZ: 20 MHz bandwidth is not permitted
+ *	on this channel.
+ * @IEEE80211_CHAN_NO_10MHZ: 10 MHz bandwidth is not permitted
+ *	on this channel.
+ *
  */
 enum ieee80211_channel_flags {
 	IEEE80211_CHAN_DISABLED		= 1<<0,
@@ -120,6 +127,10 @@ enum ieee80211_channel_flags {
 	IEEE80211_CHAN_NO_OFDM		= 1<<6,
 	IEEE80211_CHAN_NO_80MHZ		= 1<<7,
 	IEEE80211_CHAN_NO_160MHZ	= 1<<8,
+	IEEE80211_CHAN_INDOOR_ONLY	= 1<<9,
+	IEEE80211_CHAN_GO_CONCURRENT	= 1<<10,
+	IEEE80211_CHAN_NO_20MHZ		= 1<<11,
+	IEEE80211_CHAN_NO_10MHZ		= 1<<12,
 };
 
 #define IEEE80211_CHAN_NO_HT40 \
@@ -441,10 +452,13 @@ bool cfg80211_chandef_usable(struct wiphy *wiphy,
  * cfg80211_chandef_dfs_required - checks if radar detection is required
  * @wiphy: the wiphy to validate against
  * @chandef: the channel definition to check
- * Return: 1 if radar detection is required, 0 if it is not, < 0 on error
+ * @iftype: the interface type as specified in &enum nl80211_iftype
+ * Returns:
+ *	1 if radar detection is required, 0 if it is not, < 0 on error
  */
 int cfg80211_chandef_dfs_required(struct wiphy *wiphy,
-				  const struct cfg80211_chan_def *chandef);
+				  const struct cfg80211_chan_def *chandef,
+				  enum nl80211_iftype);
 
 /**
  * ieee80211_chandef_rate_flags - returns rate flags for a channel
@@ -654,7 +668,6 @@ struct cfg80211_acl_data {
  * @p2p_opp_ps: P2P opportunistic PS
  * @acl: ACL configuration used by the drivers which has support for
  *	MAC address based access control
- * @radar_required: set if radar detection is required
  */
 struct cfg80211_ap_settings {
 	struct cfg80211_chan_def chandef;
@@ -672,7 +685,6 @@ struct cfg80211_ap_settings {
 	u8 p2p_ctwindow;
 	bool p2p_opp_ps;
 	const struct cfg80211_acl_data *acl;
-	bool radar_required;
 };
 
 /**
@@ -2278,6 +2290,10 @@ struct cfg80211_qos_map {
  * @channel_switch: initiate channel-switch procedure (with CSA)
  *
  * @set_qos_map: Set QoS mapping information to the driver
+ *
+ * @set_ap_chanwidth: Set the AP (including P2P GO) mode channel width for the
+ *	given interface This is used e.g. for dynamic HT 20/40 MHz channel width
+ *	changes during the lifetime of the BSS.
  */
 struct cfg80211_ops {
 	int	(*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@@ -2521,9 +2537,13 @@ struct cfg80211_ops {
 	int	(*channel_switch)(struct wiphy *wiphy,
 				  struct net_device *dev,
 				  struct cfg80211_csa_settings *params);
+
 	int     (*set_qos_map)(struct wiphy *wiphy,
 			       struct net_device *dev,
 			       struct cfg80211_qos_map *qos_map);
+
+	int	(*set_ap_chanwidth)(struct wiphy *wiphy, struct net_device *dev,
+				    struct cfg80211_chan_def *chandef);
 };
 
 /*
@@ -3194,6 +3214,7 @@ struct cfg80211_cached_keys;
  * @ibss_dfs_possible: (private) IBSS may change to a DFS channel
  * @event_list: (private) list for internal event processing
  * @event_lock: (private) lock for event list
+ * @owner_nlportid: (private) owner socket port ID
  */
 struct wireless_dev {
 	struct wiphy *wiphy;
@@ -3241,6 +3262,8 @@ struct wireless_dev {
 	unsigned long cac_start_time;
 	unsigned int cac_time_ms;
 
+	u32 owner_nlportid;
+
 #ifdef CONFIG_CFG80211_WEXT
 	/* wext data */
 	struct {
@@ -3600,7 +3623,7 @@ int regulatory_hint(struct wiphy *wiphy, const char *alpha2);
  * default channel settings will be disregarded. If no rule is found for a
  * channel on the regulatory domain the channel will be disabled.
  * Drivers using this for a wiphy should also set the wiphy flag
- * WIPHY_FLAG_CUSTOM_REGULATORY or cfg80211 will set it for the wiphy
+ * REGULATORY_CUSTOM_REG or cfg80211 will set it for the wiphy
  * that called this helper.
  */
 void wiphy_apply_custom_regulatory(struct wiphy *wiphy,
@@ -4531,12 +4554,14 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy,
  * cfg80211_reg_can_beacon - check if beaconing is allowed
  * @wiphy: the wiphy
  * @chandef: the channel definition
+ * @iftype: interface type
  *
  * Return: %true if there is no secondary channel or the secondary channel(s)
  * can be used for beaconing (i.e. is not a radar channel etc.)
  */
 bool cfg80211_reg_can_beacon(struct wiphy *wiphy,
-			     struct cfg80211_chan_def *chandef);
+			     struct cfg80211_chan_def *chandef,
+			     enum nl80211_iftype iftype);
 
 /*
  * cfg80211_ch_switch_notify - update wdev channel and notify userspace
@@ -4682,6 +4707,55 @@ void cfg80211_crit_proto_stopped(struct wireless_dev *wdev, gfp_t gfp);
  */
 unsigned int ieee80211_get_num_supported_channels(struct wiphy *wiphy);
 
+/**
+ * cfg80211_check_combinations - check interface combinations
+ *
+ * @wiphy: the wiphy
+ * @num_different_channels: the number of different channels we want
+ *	to use for verification
+ * @radar_detect: a bitmap where each bit corresponds to a channel
+ *	width where radar detection is needed, as in the definition of
+ *	&struct ieee80211_iface_combination.@radar_detect_widths
+ * @iftype_num: array with the numbers of interfaces of each interface
+ *	type.  The index is the interface type as specified in &enum
+ *	nl80211_iftype.
+ *
+ * This function can be called by the driver to check whether a
+ * combination of interfaces and their types are allowed according to
+ * the interface combinations.
+ */
+int cfg80211_check_combinations(struct wiphy *wiphy,
+				const int num_different_channels,
+				const u8 radar_detect,
+				const int iftype_num[NUM_NL80211_IFTYPES]);
+
+/**
+ * cfg80211_iter_combinations - iterate over matching combinations
+ *
+ * @wiphy: the wiphy
+ * @num_different_channels: the number of different channels we want
+ *	to use for verification
+ * @radar_detect: a bitmap where each bit corresponds to a channel
+ *	width where radar detection is needed, as in the definition of
+ *	&struct ieee80211_iface_combination.@radar_detect_widths
+ * @iftype_num: array with the numbers of interfaces of each interface
+ *	type.  The index is the interface type as specified in &enum
+ *	nl80211_iftype.
+ * @iter: function to call for each matching combination
+ * @data: pointer to pass to iter function
+ *
+ * This function can be called by the driver to check what possible
+ * combinations it fits in at a given moment, e.g. for channel switching
+ * purposes.
+ */
+int cfg80211_iter_combinations(struct wiphy *wiphy,
+			       const int num_different_channels,
+			       const u8 radar_detect,
+			       const int iftype_num[NUM_NL80211_IFTYPES],
+			       void (*iter)(const struct ieee80211_iface_combination *c,
+					    void *data),
+			       void *data);
+
 /* Logging, debugging and troubleshooting/diagnostic helpers. */
 
 /* wiphy_printk helpers, similar to dev_printk */
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 8248e3909fdf..451c1bf00df9 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1202,14 +1202,18 @@ struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev);
  *	fall back to software crypto. Note that this flag deals only with
  *	RX, if your crypto engine can't deal with TX you can also set the
  *	%IEEE80211_KEY_FLAG_SW_MGMT_TX flag to encrypt such frames in SW.
+ * @IEEE80211_KEY_FLAG_GENERATE_IV_MGMT: This flag should be set by the
+ *	driver for a CCMP key to indicate that is requires IV generation
+ *	only for managment frames (MFP).
  */
 enum ieee80211_key_flags {
-	IEEE80211_KEY_FLAG_GENERATE_IV	= 1<<1,
-	IEEE80211_KEY_FLAG_GENERATE_MMIC= 1<<2,
-	IEEE80211_KEY_FLAG_PAIRWISE	= 1<<3,
-	IEEE80211_KEY_FLAG_SW_MGMT_TX	= 1<<4,
-	IEEE80211_KEY_FLAG_PUT_IV_SPACE = 1<<5,
-	IEEE80211_KEY_FLAG_RX_MGMT	= 1<<6,
+	IEEE80211_KEY_FLAG_GENERATE_IV_MGMT	= BIT(0),
+	IEEE80211_KEY_FLAG_GENERATE_IV		= BIT(1),
+	IEEE80211_KEY_FLAG_GENERATE_MMIC	= BIT(2),
+	IEEE80211_KEY_FLAG_PAIRWISE		= BIT(3),
+	IEEE80211_KEY_FLAG_SW_MGMT_TX		= BIT(4),
+	IEEE80211_KEY_FLAG_PUT_IV_SPACE		= BIT(5),
+	IEEE80211_KEY_FLAG_RX_MGMT		= BIT(6),
 };
 
 /**
@@ -1555,6 +1559,12 @@ struct ieee80211_tx_control {
  *	for a single active channel while using channel contexts. When support
  *	is not enabled the default action is to disconnect when getting the
  *	CSA frame.
+ *
+ * @IEEE80211_HW_CHANGE_RUNNING_CHANCTX: The hardware can change a
+ *	channel context on-the-fly.  This is needed for channel switch
+ *	on single-channel hardware.  It can also be used as an
+ *	optimization in certain channel switch cases with
+ *	multi-channel.
  */
 enum ieee80211_hw_flags {
 	IEEE80211_HW_HAS_RATE_CONTROL			= 1<<0,
@@ -1586,6 +1596,7 @@ enum ieee80211_hw_flags {
 	IEEE80211_HW_TIMING_BEACON_ONLY			= 1<<26,
 	IEEE80211_HW_SUPPORTS_HT_CCK_RATES		= 1<<27,
 	IEEE80211_HW_CHANCTX_STA_CSA			= 1<<28,
+	IEEE80211_HW_CHANGE_RUNNING_CHANCTX		= 1<<29,
 };
 
 /**
@@ -2609,6 +2620,7 @@ enum ieee80211_roc_type {
  *	of queues to flush, which is useful if different virtual interfaces
  *	use different hardware queues; it may also indicate all queues.
  *	If the parameter @drop is set to %true, pending frames may be dropped.
+ *	Note that vif can be NULL.
  *	The callback can sleep.
  *
  * @channel_switch: Drivers that need (or want) to offload the channel
@@ -2871,7 +2883,8 @@ struct ieee80211_ops {
 			     struct netlink_callback *cb,
 			     void *data, int len);
 #endif
-	void (*flush)(struct ieee80211_hw *hw, u32 queues, bool drop);
+	void (*flush)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+		      u32 queues, bool drop);
 	void (*channel_switch)(struct ieee80211_hw *hw,
 			       struct ieee80211_channel_switch *ch_switch);
 	int (*set_antenna)(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
@@ -4576,7 +4589,9 @@ conf_is_ht40(struct ieee80211_conf *conf)
 static inline bool
 conf_is_ht(struct ieee80211_conf *conf)
 {
-	return conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT;
+	return (conf->chandef.width != NL80211_CHAN_WIDTH_5) &&
+		(conf->chandef.width != NL80211_CHAN_WIDTH_10) &&
+		(conf->chandef.width != NL80211_CHAN_WIDTH_20_NOHT);
 }
 
 static inline enum nl80211_iftype
diff --git a/include/net/regulatory.h b/include/net/regulatory.h
index 75fc1f5a948d..259992444e80 100644
--- a/include/net/regulatory.h
+++ b/include/net/regulatory.h
@@ -131,6 +131,11 @@ struct regulatory_request {
  * 	all country IE information processed by the regulatory core. This will
  * 	override %REGULATORY_COUNTRY_IE_FOLLOW_POWER as all country IEs will
  * 	be ignored.
+ * @REGULATORY_ENABLE_RELAX_NO_IR: for devices that wish to allow the
+ *      NO_IR relaxation, which enables transmissions on channels on which
+ *      otherwise initiating radiation is not allowed. This will enable the
+ *      relaxations enabled under the CFG80211_REG_RELAX_NO_IR configuration
+ *      option
  */
 enum ieee80211_regulatory_flags {
 	REGULATORY_CUSTOM_REG			= BIT(0),
@@ -138,6 +143,7 @@ enum ieee80211_regulatory_flags {
 	REGULATORY_DISABLE_BEACON_HINTS		= BIT(2),
 	REGULATORY_COUNTRY_IE_FOLLOW_POWER	= BIT(3),
 	REGULATORY_COUNTRY_IE_IGNORE		= BIT(4),
+	REGULATORY_ENABLE_RELAX_NO_IR           = BIT(5),
 };
 
 struct ieee80211_freq_range {
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 1ba9d626aa83..406010d4def0 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -1579,6 +1579,10 @@ enum nl80211_commands {
  * @NL80211_ATTR_TDLS_PEER_CAPABILITY: flags for TDLS peer capabilities, u32.
  *	As specified in the &enum nl80211_tdls_peer_capability.
  *
+ * @NL80211_ATTR_IFACE_SOCKET_OWNER: flag attribute, if set during interface
+ *	creation then the new interface will be owned by the netlink socket
+ *	that created it and will be destroyed when the socket is closed
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -1914,6 +1918,8 @@ enum nl80211_attrs {
 
 	NL80211_ATTR_TDLS_PEER_CAPABILITY,
 
+	NL80211_ATTR_IFACE_SOCKET_OWNER,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
@@ -2336,9 +2342,34 @@ enum nl80211_band_attr {
  *	using this channel as the primary or any of the secondary channels
  *	isn't possible
  * @NL80211_FREQUENCY_ATTR_DFS_CAC_TIME: DFS CAC time in milliseconds.
+ * @NL80211_FREQUENCY_ATTR_INDOOR_ONLY: Only indoor use is permitted on this
+ *	channel. A channel that has the INDOOR_ONLY attribute can only be
+ *	used when there is a clear assessment that the device is operating in
+ *	an indoor surroundings, i.e., it is connected to AC power (and not
+ *	through portable DC inverters) or is under the control of a master
+ *	that is acting as an AP and is connected to AC power.
+ * @NL80211_FREQUENCY_ATTR_GO_CONCURRENT: GO operation is allowed on this
+ *	channel if it's connected concurrently to a BSS on the same channel on
+ *	the 2 GHz band or to a channel in the same UNII band (on the 5 GHz
+ *	band), and IEEE80211_CHAN_RADAR is not set. Instantiating a GO on a
+ *	channel that has the GO_CONCURRENT attribute set can be done when there
+ *	is a clear assessment that the device is operating under the guidance of
+ *	an authorized master, i.e., setting up a GO while the device is also
+ *	connected to an AP with DFS and radar detection on the UNII band (it is
+ *	up to user-space, i.e., wpa_supplicant to perform the required
+ *	verifications)
+ * @NL80211_FREQUENCY_ATTR_NO_20MHZ: 20 MHz operation is not allowed
+ *	on this channel in current regulatory domain.
+ * @NL80211_FREQUENCY_ATTR_NO_10MHZ: 10 MHz operation is not allowed
+ *	on this channel in current regulatory domain.
  * @NL80211_FREQUENCY_ATTR_MAX: highest frequency attribute number
  *	currently defined
  * @__NL80211_FREQUENCY_ATTR_AFTER_LAST: internal use
+ *
+ * See https://apps.fcc.gov/eas/comments/GetPublishedDocument.html?id=327&tn=528122
+ * for more information on the FCC description of the relaxations allowed
+ * by NL80211_FREQUENCY_ATTR_INDOOR_ONLY and
+ * NL80211_FREQUENCY_ATTR_GO_CONCURRENT.
  */
 enum nl80211_frequency_attr {
 	__NL80211_FREQUENCY_ATTR_INVALID,
@@ -2355,6 +2386,10 @@ enum nl80211_frequency_attr {
 	NL80211_FREQUENCY_ATTR_NO_80MHZ,
 	NL80211_FREQUENCY_ATTR_NO_160MHZ,
 	NL80211_FREQUENCY_ATTR_DFS_CAC_TIME,
+	NL80211_FREQUENCY_ATTR_INDOOR_ONLY,
+	NL80211_FREQUENCY_ATTR_GO_CONCURRENT,
+	NL80211_FREQUENCY_ATTR_NO_20MHZ,
+	NL80211_FREQUENCY_ATTR_NO_10MHZ,
 
 	/* keep last */
 	__NL80211_FREQUENCY_ATTR_AFTER_LAST,
@@ -2573,10 +2608,13 @@ enum nl80211_dfs_regions {
  *	present has been registered with the wireless core that
  *	has listed NL80211_FEATURE_CELL_BASE_REG_HINTS as a
  *	supported feature.
+ * @NL80211_USER_REG_HINT_INDOOR: a user sent an hint indicating that the
+ *	platform is operating in an indoor environment.
  */
 enum nl80211_user_reg_hint_type {
 	NL80211_USER_REG_HINT_USER	= 0,
 	NL80211_USER_REG_HINT_CELL_BASE = 1,
+	NL80211_USER_REG_HINT_INDOOR    = 2,
 };
 
 /**
@@ -3891,6 +3929,9 @@ enum nl80211_ap_sme_features {
  *	interface. An active monitor interface behaves like a normal monitor
  *	interface, but gets added to the driver. It ensures that incoming
  *	unicast packets directed at the configured interface address get ACKed.
+ * @NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE: This driver supports dynamic
+ *	channel bandwidth change (e.g., HT 20 <-> 40 MHz channel) during the
+ *	lifetime of a BSS.
  */
 enum nl80211_feature_flags {
 	NL80211_FEATURE_SK_TX_STATUS			= 1 << 0,
@@ -3911,6 +3952,7 @@ enum nl80211_feature_flags {
 	NL80211_FEATURE_FULL_AP_CLIENT_STATE		= 1 << 15,
 	NL80211_FEATURE_USERSPACE_MPM			= 1 << 16,
 	NL80211_FEATURE_ACTIVE_MONITOR			= 1 << 17,
+	NL80211_FEATURE_AP_MODE_CHAN_WIDTH_CHANGE	= 1 << 18,
 };
 
 /**