1 files changed, 54 insertions, 0 deletions

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 7285bdc4e598..85b5aa3c76f8 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -3491,6 +3491,60 @@ void nl80211_michael_mic_failure(struct cfg80211_registered_device *rdev,
         nlmsg_free(msg);
 }
 
+void nl80211_send_beacon_hint_event(struct wiphy *wiphy,
+                                    struct ieee80211_channel *channel_before,
+                                    struct ieee80211_channel *channel_after)
+{
+        struct sk_buff *msg;
+        void *hdr;
+        struct nlattr *nl_freq;
+
+        msg = nlmsg_new(NLMSG_GOODSIZE, GFP_ATOMIC);
+        if (!msg)
+                return;
+
+        hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_REG_BEACON_HINT);
+        if (!hdr) {
+                nlmsg_free(msg);
+                return;
+        }
+
+        /*
+         * Since we are applying the beacon hint to a wiphy we know its
+         * wiphy_idx is valid
+         */
+        NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, get_wiphy_idx(wiphy));
+
+        /* Before */
+        nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_BEFORE);
+        if (!nl_freq)
+                goto nla_put_failure;
+        if (nl80211_msg_put_channel(msg, channel_before))
+                goto nla_put_failure;
+        nla_nest_end(msg, nl_freq);
+
+        /* After */
+        nl_freq = nla_nest_start(msg, NL80211_ATTR_FREQ_AFTER);
+        if (!nl_freq)
+                goto nla_put_failure;
+        if (nl80211_msg_put_channel(msg, channel_after))
+                goto nla_put_failure;
+        nla_nest_end(msg, nl_freq);
+
+        if (genlmsg_end(msg, hdr) < 0) {
+                nlmsg_free(msg);
+                return;
+        }
+
+        genlmsg_multicast(msg, 0, nl80211_regulatory_mcgrp.id, GFP_ATOMIC);
+
+        return;
+
+nla_put_failure:
+        genlmsg_cancel(msg, hdr);
+        nlmsg_free(msg);
+}
+
 /* initialisation/exit functions */
 
 int nl80211_init(void)