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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Johannes Berg <johannes.berg@intel.com>
Subject: [PATCH 4.20 14/50] cfg80211: call disconnect_wk when AP stops
Date:   Wed, 13 Feb 2019 19:38:19 +0100
Message-Id: <20190213183656.954676443@linuxfoundation.org>
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4.20-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Johannes Berg <johannes.berg@intel.com>

commit e005bd7ddea06784c1eb91ac5bb6b171a94f3b05 upstream.

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@vger.kernel.org
Fixes: 113f3aaa81bd ("cfg80211: Prevent regulatory restore during STA disconnect in concurrent interfaces")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 net/wireless/ap.c   |    2 ++
 net/wireless/core.h |    2 ++
 net/wireless/sme.c  |    2 +-
 3 files changed, 5 insertions(+), 1 deletion(-)

--- a/net/wireless/ap.c
+++ b/net/wireless/ap.c
@@ -41,6 +41,8 @@ int __cfg80211_stop_ap(struct cfg80211_r
 		cfg80211_sched_dfs_chan_update(rdev);
 	}
 
+	schedule_work(&cfg80211_disconnect_work);
+
 	return err;
 }
 
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -444,6 +444,8 @@ void cfg80211_process_wdev_events(struct
 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
--- a/net/wireless/sme.c
+++ b/net/wireless/sme.c
@@ -667,7 +667,7 @@ static void disconnect_work(struct work_
 	rtnl_unlock();
 }
 
-static DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
+DECLARE_WORK(cfg80211_disconnect_work, disconnect_work);
 
 
 /*