commit c8ff71e667d9fcf775e8b8bbd568d32d48cfb864
author Arik Nemtsov <arik@wizery.com> Wed Jul 08 15:41:45 2015 +0300
committer Johannes Berg <johannes.berg@intel.com> Fri Jul 17 15:40:15 2015 +0200
tree 0b2815a3d230575c1ce9dcf6419119124d30993f
parent 72bbe3d1c2d7a9e257956912040ffc7ba9f71e0d

mac80211: TDLS: handle chan-switch in RTNL locked work

Move TDLS channel-switch Rx handling into an RTNL locked work. This is
required to add proper regulatory checking to incoming channel-switch
requests.
Queue incoming requests in a dedicated skb queue and handle the request
in a device-specific work to avoid deadlocking on interface removal.

Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/main.c

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index dba0a86..ff79a13 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -629,6 +629,8 @@
 	INIT_WORK(&local->sched_scan_stopped_work,
 		  ieee80211_sched_scan_stopped_work);
 
+	INIT_WORK(&local->tdls_chsw_work, ieee80211_tdls_chsw_work);
+
 	spin_lock_init(&local->ack_status_lock);
 	idr_init(&local->ack_status_frames);
 
@@ -645,6 +647,7 @@
 
 	skb_queue_head_init(&local->skb_queue);
 	skb_queue_head_init(&local->skb_queue_unreliable);
+	skb_queue_head_init(&local->skb_queue_tdls_chsw);
 
 	ieee80211_alloc_led_names(local);
 
@@ -1161,6 +1164,7 @@
 
 	cancel_work_sync(&local->restart_work);
 	cancel_work_sync(&local->reconfig_filter);
+	cancel_work_sync(&local->tdls_chsw_work);
 	flush_work(&local->sched_scan_stopped_work);
 
 	ieee80211_clear_tx_pending(local);
@@ -1171,6 +1175,7 @@
 		wiphy_warn(local->hw.wiphy, "skb_queue not empty\n");
 	skb_queue_purge(&local->skb_queue);
 	skb_queue_purge(&local->skb_queue_unreliable);
+	skb_queue_purge(&local->skb_queue_tdls_chsw);
 
 	destroy_workqueue(local->workqueue);
 	wiphy_unregister(local->hw.wiphy);