diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index da8ea2e..2bfbe88 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -270,6 +270,31 @@
  * @NL80211_CMD_SET_WIPHY_NETNS: Set a wiphy's netns. Note that all devices
  *	associated with this wiphy must be down and will follow.
  *
+ * @NL80211_CMD_REMAIN_ON_CHANNEL: Request to remain awake on the specified
+ *	channel for the specified amount of time. This can be used to do
+ *	off-channel operations like transmit a Public Action frame and wait for
+ *	a response while being associated to an AP on another channel.
+ *	%NL80211_ATTR_WIPHY or %NL80211_ATTR_IFINDEX is used to specify which
+ *	radio is used. %NL80211_ATTR_WIPHY_FREQ is used to specify the
+ *	frequency for the operation and %NL80211_ATTR_WIPHY_CHANNEL_TYPE may be
+ *	optionally used to specify additional channel parameters.
+ *	%NL80211_ATTR_DURATION is used to specify the duration in milliseconds
+ *	to remain on the channel. This command is also used as an event to
+ *	notify when the requested duration starts (it may take a while for the
+ *	driver to schedule this time due to other concurrent needs for the
+ *	radio).
+ *	When called, this operation returns a cookie (%NL80211_ATTR_COOKIE)
+ *	that will be included with any events pertaining to this request;
+ *	the cookie is also used to cancel the request.
+ * @NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL: This command can be used to cancel a
+ *	pending remain-on-channel duration if the desired operation has been
+ *	completed prior to expiration of the originally requested duration.
+ *	%NL80211_ATTR_WIPHY or %NL80211_ATTR_IFINDEX is used to specify the
+ *	radio. The %NL80211_ATTR_COOKIE attribute must be given as well to
+ *	uniquely identify the request.
+ *	This command is also used as an event to notify when a requested
+ *	remain-on-channel duration has expired.
+ *
  * @NL80211_CMD_MAX: highest used command number
  * @__NL80211_CMD_AFTER_LAST: internal use
  */
@@ -353,6 +378,9 @@
 	NL80211_CMD_DEL_PMKSA,
 	NL80211_CMD_FLUSH_PMKSA,
 
+	NL80211_CMD_REMAIN_ON_CHANNEL,
+	NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
+
 	/* add new commands above here */
 
 	/* used to define NL80211_CMD_MAX below */
@@ -606,6 +634,10 @@
  * @NL80211_ATTR_MAX_NUM_PMKIDS: maximum number of PMKIDs a firmware can
  *	cache, a wiphy attribute.
  *
+ * @NL80211_ATTR_DURATION: Duration of an operation in milliseconds, u32.
+ *
+ * @NL80211_ATTR_COOKIE: Generic 64-bit cookie to identify objects.
+ *
  * @NL80211_ATTR_MAX: highest attribute number currently defined
  * @__NL80211_ATTR_AFTER_LAST: internal use
  */
@@ -743,6 +775,10 @@
 	NL80211_ATTR_PMKID,
 	NL80211_ATTR_MAX_NUM_PMKIDS,
 
+	NL80211_ATTR_DURATION,
+
+	NL80211_ATTR_COOKIE,
+
 	/* add attributes here, update the policy in nl80211.c */
 
 	__NL80211_ATTR_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 542a477..b66beb0 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -988,6 +988,15 @@
  *
  * @dump_survey: get site survey information.
  *
+ * @remain_on_channel: Request the driver to remain awake on the specified
+ *	channel for the specified duration to complete an off-channel
+ *	operation (e.g., public action frame exchange). When the driver is
+ *	ready on the requested channel, it must indicate this with an event
+ *	notification by calling cfg80211_ready_on_channel().
+ * @cancel_remain_on_channel: Cancel an on-going remain-on-channel operation.
+ *	This allows the operation to be terminated prior to timeout based on
+ *	the duration value.
+ *
  * @testmode_cmd: run a test mode command
  *
  * @set_pmksa: Cache a PMKID for a BSSID. This is mostly useful for fullmac
@@ -1123,6 +1132,16 @@
 			     struct cfg80211_pmksa *pmksa);
 	int	(*flush_pmksa)(struct wiphy *wiphy, struct net_device *netdev);
 
+	int	(*remain_on_channel)(struct wiphy *wiphy,
+				     struct net_device *dev,
+				     struct ieee80211_channel *chan,
+				     enum nl80211_channel_type channel_type,
+				     unsigned int duration,
+				     u64 *cookie);
+	int	(*cancel_remain_on_channel)(struct wiphy *wiphy,
+					    struct net_device *dev,
+					    u64 cookie);
+
 	/* some temporary stuff to finish wext */
 	int	(*set_power_mgmt)(struct wiphy *wiphy, struct net_device *dev,
 				  bool enabled, int timeout);
@@ -2147,5 +2166,33 @@
 void cfg80211_disconnected(struct net_device *dev, u16 reason,
 			   u8 *ie, size_t ie_len, gfp_t gfp);
 
+/**
+ * cfg80211_ready_on_channel - notification of remain_on_channel start
+ * @dev: network device
+ * @cookie: the request cookie
+ * @chan: The current channel (from remain_on_channel request)
+ * @channel_type: Channel type
+ * @duration: Duration in milliseconds that the driver intents to remain on the
+ *	channel
+ * @gfp: allocation flags
+ */
+void cfg80211_ready_on_channel(struct net_device *dev, u64 cookie,
+			       struct ieee80211_channel *chan,
+			       enum nl80211_channel_type channel_type,
+			       unsigned int duration, gfp_t gfp);
+
+/**
+ * cfg80211_remain_on_channel_expired - remain_on_channel duration expired
+ * @dev: network device
+ * @cookie: the request cookie
+ * @chan: The current channel (from remain_on_channel request)
+ * @channel_type: Channel type
+ * @gfp: allocation flags
+ */
+void cfg80211_remain_on_channel_expired(struct net_device *dev,
+					u64 cookie,
+					struct ieee80211_channel *chan,
+					enum nl80211_channel_type channel_type,
+					gfp_t gfp);
 
 #endif /* __NET_CFG80211_H */
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index a46ac6c..bf1737f 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -41,12 +41,45 @@
 	return result;
 }
 
+struct ieee80211_channel *
+rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
+		  int freq, enum nl80211_channel_type channel_type)
+{
+	struct ieee80211_channel *chan;
+	struct ieee80211_sta_ht_cap *ht_cap;
+
+	chan = ieee80211_get_channel(&rdev->wiphy, freq);
+
+	/* Primary channel not allowed */
+	if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
+		return NULL;
+
+	if (channel_type == NL80211_CHAN_HT40MINUS &&
+	    chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
+		return NULL;
+	else if (channel_type == NL80211_CHAN_HT40PLUS &&
+		 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
+		return NULL;
+
+	ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
+
+	if (channel_type != NL80211_CHAN_NO_HT) {
+		if (!ht_cap->ht_supported)
+			return NULL;
+
+		if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
+		    ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT)
+			return NULL;
+	}
+
+	return chan;
+}
+
 int rdev_set_freq(struct cfg80211_registered_device *rdev,
 		  struct wireless_dev *for_wdev,
 		  int freq, enum nl80211_channel_type channel_type)
 {
 	struct ieee80211_channel *chan;
-	struct ieee80211_sta_ht_cap *ht_cap;
 	int result;
 
 	if (rdev_fixed_channel(rdev, for_wdev))
@@ -55,30 +88,10 @@
 	if (!rdev->ops->set_channel)
 		return -EOPNOTSUPP;
 
-	chan = ieee80211_get_channel(&rdev->wiphy, freq);
-
-	/* Primary channel not allowed */
-	if (!chan || chan->flags & IEEE80211_CHAN_DISABLED)
+	chan = rdev_freq_to_chan(rdev, freq, channel_type);
+	if (!chan)
 		return -EINVAL;
 
-	if (channel_type == NL80211_CHAN_HT40MINUS &&
-	    chan->flags & IEEE80211_CHAN_NO_HT40MINUS)
-		return -EINVAL;
-	else if (channel_type == NL80211_CHAN_HT40PLUS &&
-		 chan->flags & IEEE80211_CHAN_NO_HT40PLUS)
-		return -EINVAL;
-
-	ht_cap = &rdev->wiphy.bands[chan->band]->ht_cap;
-
-	if (channel_type != NL80211_CHAN_NO_HT) {
-		if (!ht_cap->ht_supported)
-			return -EINVAL;
-
-		if (!(ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) ||
-		    ht_cap->cap & IEEE80211_HT_CAP_40MHZ_INTOLERANT)
-			return -EINVAL;
-	}
-
 	result = rdev->ops->set_channel(&rdev->wiphy, chan, channel_type);
 	if (result)
 		return result;
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 35b7121..30ec95f 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -374,6 +374,9 @@
 struct ieee80211_channel *
 rdev_fixed_channel(struct cfg80211_registered_device *rdev,
 		   struct wireless_dev *for_wdev);
+struct ieee80211_channel *
+rdev_freq_to_chan(struct cfg80211_registered_device *rdev,
+		  int freq, enum nl80211_channel_type channel_type);
 int rdev_set_freq(struct cfg80211_registered_device *rdev,
 		  struct wireless_dev *for_wdev,
 		  int freq, enum nl80211_channel_type channel_type);
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index acaeaa7..11f6469 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -680,3 +680,30 @@
 		}
 	}
 }
+
+void cfg80211_ready_on_channel(struct net_device *dev, u64 cookie,
+			       struct ieee80211_channel *chan,
+			       enum nl80211_channel_type channel_type,
+			       unsigned int duration, gfp_t gfp)
+{
+	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+
+	nl80211_send_remain_on_channel(rdev, dev, cookie, chan, channel_type,
+				       duration, gfp);
+}
+EXPORT_SYMBOL(cfg80211_ready_on_channel);
+
+void cfg80211_remain_on_channel_expired(struct net_device *dev,
+					u64 cookie,
+					struct ieee80211_channel *chan,
+					enum nl80211_channel_type channel_type,
+					gfp_t gfp)
+{
+	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
+	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+
+	nl80211_send_remain_on_channel_cancel(rdev, dev, cookie, chan,
+					      channel_type, gfp);
+}
+EXPORT_SYMBOL(cfg80211_remain_on_channel_expired);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 60f8543..ff857f1 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -141,6 +141,8 @@
 	[NL80211_ATTR_4ADDR] = { .type = NLA_U8 },
 	[NL80211_ATTR_PMKID] = { .type = NLA_BINARY,
 				 .len = WLAN_PMKID_LEN },
+	[NL80211_ATTR_DURATION] = { .type = NLA_U32 },
+	[NL80211_ATTR_COOKIE] = { .type = NLA_U64 },
 };
 
 /* policy for the attributes */
@@ -569,6 +571,7 @@
 	CMD(set_pmksa, SET_PMKSA);
 	CMD(del_pmksa, DEL_PMKSA);
 	CMD(flush_pmksa, FLUSH_PMKSA);
+	CMD(remain_on_channel, REMAIN_ON_CHANNEL);
 	if (dev->wiphy.flags & WIPHY_FLAG_NETNS_OK) {
 		i++;
 		NLA_PUT_U32(msg, i, NL80211_CMD_SET_WIPHY_NETNS);
@@ -4283,6 +4286,143 @@
 
 }
 
+static int nl80211_remain_on_channel(struct sk_buff *skb,
+				     struct genl_info *info)
+{
+	struct cfg80211_registered_device *rdev;
+	struct net_device *dev;
+	struct ieee80211_channel *chan;
+	struct sk_buff *msg;
+	void *hdr;
+	u64 cookie;
+	enum nl80211_channel_type channel_type = NL80211_CHAN_NO_HT;
+	u32 freq, duration;
+	int err;
+
+	if (!info->attrs[NL80211_ATTR_WIPHY_FREQ] ||
+	    !info->attrs[NL80211_ATTR_DURATION])
+		return -EINVAL;
+
+	duration = nla_get_u32(info->attrs[NL80211_ATTR_DURATION]);
+
+	/*
+	 * We should be on that channel for at least one jiffie,
+	 * and more than 5 seconds seems excessive.
+	 */
+	if (!duration || !msecs_to_jiffies(duration) || duration > 5000)
+		return -EINVAL;
+
+	rtnl_lock();
+
+	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
+	if (err)
+		goto unlock_rtnl;
+
+	if (!rdev->ops->remain_on_channel) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	if (!netif_running(dev)) {
+		err = -ENETDOWN;
+		goto out;
+	}
+
+	if (info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]) {
+		channel_type = nla_get_u32(
+			info->attrs[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
+		if (channel_type != NL80211_CHAN_NO_HT &&
+		    channel_type != NL80211_CHAN_HT20 &&
+		    channel_type != NL80211_CHAN_HT40PLUS &&
+		    channel_type != NL80211_CHAN_HT40MINUS)
+			err = -EINVAL;
+			goto out;
+	}
+
+	freq = nla_get_u32(info->attrs[NL80211_ATTR_WIPHY_FREQ]);
+	chan = rdev_freq_to_chan(rdev, freq, channel_type);
+	if (chan == NULL) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+	if (!msg) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	hdr = nl80211hdr_put(msg, info->snd_pid, info->snd_seq, 0,
+			     NL80211_CMD_REMAIN_ON_CHANNEL);
+
+	if (IS_ERR(hdr)) {
+		err = PTR_ERR(hdr);
+		goto free_msg;
+	}
+
+	err = rdev->ops->remain_on_channel(&rdev->wiphy, dev, chan,
+					   channel_type, duration, &cookie);
+
+	if (err)
+		goto free_msg;
+
+	NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
+
+	genlmsg_end(msg, hdr);
+	err = genlmsg_reply(msg, info);
+	goto out;
+
+ nla_put_failure:
+	err = -ENOBUFS;
+ free_msg:
+	nlmsg_free(msg);
+ out:
+	cfg80211_unlock_rdev(rdev);
+	dev_put(dev);
+ unlock_rtnl:
+	rtnl_unlock();
+	return err;
+}
+
+static int nl80211_cancel_remain_on_channel(struct sk_buff *skb,
+					    struct genl_info *info)
+{
+	struct cfg80211_registered_device *rdev;
+	struct net_device *dev;
+	u64 cookie;
+	int err;
+
+	if (!info->attrs[NL80211_ATTR_COOKIE])
+		return -EINVAL;
+
+	rtnl_lock();
+
+	err = get_rdev_dev_by_info_ifindex(info, &rdev, &dev);
+	if (err)
+		goto unlock_rtnl;
+
+	if (!rdev->ops->cancel_remain_on_channel) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	if (!netif_running(dev)) {
+		err = -ENETDOWN;
+		goto out;
+	}
+
+	cookie = nla_get_u64(info->attrs[NL80211_ATTR_COOKIE]);
+
+	err = rdev->ops->cancel_remain_on_channel(&rdev->wiphy, dev, cookie);
+
+ out:
+	cfg80211_unlock_rdev(rdev);
+	dev_put(dev);
+ unlock_rtnl:
+	rtnl_unlock();
+	return err;
+}
+
 static struct genl_ops nl80211_ops[] = {
 	{
 		.cmd = NL80211_CMD_GET_WIPHY,
@@ -4545,8 +4685,20 @@
 		.policy = nl80211_policy,
 		.flags = GENL_ADMIN_PERM,
 	},
-
+	{
+		.cmd = NL80211_CMD_REMAIN_ON_CHANNEL,
+		.doit = nl80211_remain_on_channel,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
+	{
+		.cmd = NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
+		.doit = nl80211_cancel_remain_on_channel,
+		.policy = nl80211_policy,
+		.flags = GENL_ADMIN_PERM,
+	},
 };
+
 static struct genl_multicast_group nl80211_mlme_mcgrp = {
 	.name = "mlme",
 };
@@ -5134,6 +5286,70 @@
 	nlmsg_free(msg);
 }
 
+static void nl80211_send_remain_on_chan_event(
+	int cmd, struct cfg80211_registered_device *rdev,
+	struct net_device *netdev, u64 cookie,
+	struct ieee80211_channel *chan,
+	enum nl80211_channel_type channel_type,
+	unsigned int duration, gfp_t gfp)
+{
+	struct sk_buff *msg;
+	void *hdr;
+
+	msg = nlmsg_new(NLMSG_DEFAULT_SIZE, gfp);
+	if (!msg)
+		return;
+
+	hdr = nl80211hdr_put(msg, 0, 0, 0, cmd);
+	if (!hdr) {
+		nlmsg_free(msg);
+		return;
+	}
+
+	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
+	NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
+	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, chan->center_freq);
+	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE, channel_type);
+	NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, cookie);
+
+	if (cmd == NL80211_CMD_REMAIN_ON_CHANNEL)
+		NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
+
+	if (genlmsg_end(msg, hdr) < 0) {
+		nlmsg_free(msg);
+		return;
+	}
+
+	genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
+				nl80211_mlme_mcgrp.id, gfp);
+	return;
+
+ nla_put_failure:
+	genlmsg_cancel(msg, hdr);
+	nlmsg_free(msg);
+}
+
+void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
+				    struct net_device *netdev, u64 cookie,
+				    struct ieee80211_channel *chan,
+				    enum nl80211_channel_type channel_type,
+				    unsigned int duration, gfp_t gfp)
+{
+	nl80211_send_remain_on_chan_event(NL80211_CMD_REMAIN_ON_CHANNEL,
+					  rdev, netdev, cookie, chan,
+					  channel_type, duration, gfp);
+}
+
+void nl80211_send_remain_on_channel_cancel(
+	struct cfg80211_registered_device *rdev, struct net_device *netdev,
+	u64 cookie, struct ieee80211_channel *chan,
+	enum nl80211_channel_type channel_type, gfp_t gfp)
+{
+	nl80211_send_remain_on_chan_event(NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL,
+					  rdev, netdev, cookie, chan,
+					  channel_type, 0, gfp);
+}
+
 /* initialisation/exit functions */
 
 int nl80211_init(void)
diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h
index 44cc2a7..a5e2de4 100644
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -59,4 +59,15 @@
 			     struct net_device *netdev, const u8 *bssid,
 			     gfp_t gfp);
 
+void nl80211_send_remain_on_channel(struct cfg80211_registered_device *rdev,
+				    struct net_device *netdev,
+				    u64 cookie,
+				    struct ieee80211_channel *chan,
+				    enum nl80211_channel_type channel_type,
+				    unsigned int duration, gfp_t gfp);
+void nl80211_send_remain_on_channel_cancel(
+	struct cfg80211_registered_device *rdev, struct net_device *netdev,
+	u64 cookie, struct ieee80211_channel *chan,
+	enum nl80211_channel_type channel_type, gfp_t gfp);
+
 #endif /* __NET_WIRELESS_NL80211_H */