[PATCH AUTOSEL 4.19 237/237] cfg80211: call disconnect_wk when AP stops

[Sasha Levin]

From: Johannes Berg <johannes.berg@xxxxxxxxx>

[ Upstream commit e005bd7ddea06784c1eb91ac5bb6b171a94f3b05 ]

Since we now prevent regulatory restore during STA disconnect
if concurrent AP interfaces are active, we need to reschedule
this check when the AP state changes. This fixes never doing
a restore when an AP is the last interface to stop. Or to put
it another way: we need to re-check after anything we check
here changes.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 113f3aaa81bd ("cfg80211: Prevent regulatory restore during STA disconnect in concurrent interfaces")
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 net/wireless/ap.c   | 2 ++
 net/wireless/core.h | 2 ++
 net/wireless/sme.c  | 2 +-
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/wireless/ap.c b/net/wireless/ap.c
index 882d97bdc6bfd..550ac9d827fe7 100644
--- a/net/wireless/ap.c
+++ b/net/wireless/ap.c
@@ -41,6 +41,8 @@ int __cfg80211_stop_ap(struct cfg80211_registered_device *rdev,
 		cfg80211_sched_dfs_chan_update(rdev);
 	}
 
+	schedule_work(&cfg80211_disconnect_work);
+
 	return err;
 }
 
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 7f52ef5693203..f5d58652108dd 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -430,6 +430,8 @@ void cfg80211_process_wdev_events(struct wireless_dev *wdev);
 bool cfg80211_does_bw_fit_range(const struct ieee80211_freq_range *freq_range,
 				u32 center_freq_khz, u32 bw_khz);
 
+extern struct work_struct cfg80211_disconnect_work;
+
 /**
  * cfg80211_chandef_dfs_usable - checks if chandef is DFS usable
  * @wiphy: the wiphy to validate against
diff --git a/net/wireless/sme.c b/net/wireless/sme.c
index c7047c7b4e80f..07c2196e9d573 100644
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -667,7 +667,7 @@ static void disconnect_work(struct work_struct *work)
 	rtnl_unlock();
 }
 
-static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
+DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 
 
 /*
-- 
2.20.1