mac80211: implement hardware offload for remain-on-channel

This allows drivers to support remain-on-channel
offload if they implement smarter timing or need
to use a device implementation like iwlwifi.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index b6db237672ff..8acba456744e 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1264,7 +1264,7 @@ u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
 {
         struct ieee80211_sub_if_data *sdata;
         int count = 0;
-        bool working = false, scanning = false;
+        bool working = false, scanning = false, hw_roc = false;
         struct ieee80211_work *wk;
         unsigned int led_trig_start = 0, led_trig_stop = 0;
 
@@ -1308,6 +1308,9 @@ u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
                 local->scan_sdata->vif.bss_conf.idle = false;
         }
 
+        if (local->hw_roc_channel)
+                hw_roc = true;
+
         list_for_each_entry(sdata, &local->interfaces, list) {
                 if (sdata->old_idle == sdata->vif.bss_conf.idle)
                         continue;
@@ -1316,7 +1319,7 @@ u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
                 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_IDLE);
         }
 
-        if (working || scanning)
+        if (working || scanning || hw_roc)
                 led_trig_start |= IEEE80211_TPT_LEDTRIG_FL_WORK;
         else
                 led_trig_stop |= IEEE80211_TPT_LEDTRIG_FL_WORK;
@@ -1328,6 +1331,8 @@ u32 __ieee80211_recalc_idle(struct ieee80211_local *local)
 
         ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop);
 
+        if (hw_roc)
+                return ieee80211_idle_off(local, "hw remain-on-channel");
         if (working)
                 return ieee80211_idle_off(local, "working");
         if (scanning)