Patch "wifi: mac80211: move sched-scan stop work to wiphy work" has been added to the 6.6-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    wifi: mac80211: move sched-scan stop work to wiphy work

to the 6.6-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     wifi-mac80211-move-sched-scan-stop-work-to-wiphy-wor.patch
and it can be found in the queue-6.6 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 9eda9f9fb799e536bf326066f0698bfc1799ff6d
Author: Johannes Berg <johannes.berg@xxxxxxxxx>
Date:   Mon Aug 28 13:59:45 2023 +0200

    wifi: mac80211: move sched-scan stop work to wiphy work
    
    [ Upstream commit eadfb54756aea5610d8d0a467f66305f777c85dd ]
    
    This also has the wiphy locked here then. We need to use
    the _locked version of cfg80211_sched_scan_stopped() now,
    which also fixes an old deadlock there.
    
    Fixes: a05829a7222e ("cfg80211: avoid holding the RTNL when calling the driver")
    Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@xxxxxxxxx>
    Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 5321f75d0c6f3..07beb72ddd25a 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -1483,7 +1483,7 @@ struct ieee80211_local {
 	int hw_scan_ies_bufsize;
 	struct cfg80211_scan_info scan_info;
 
-	struct work_struct sched_scan_stopped_work;
+	struct wiphy_work sched_scan_stopped_work;
 	struct ieee80211_sub_if_data __rcu *sched_scan_sdata;
 	struct cfg80211_sched_scan_request __rcu *sched_scan_req;
 	u8 scan_addr[ETH_ALEN];
@@ -1962,7 +1962,8 @@ int ieee80211_request_sched_scan_start(struct ieee80211_sub_if_data *sdata,
 				       struct cfg80211_sched_scan_request *req);
 int ieee80211_request_sched_scan_stop(struct ieee80211_local *local);
 void ieee80211_sched_scan_end(struct ieee80211_local *local);
-void ieee80211_sched_scan_stopped_work(struct work_struct *work);
+void ieee80211_sched_scan_stopped_work(struct wiphy *wiphy,
+				       struct wiphy_work *work);
 
 /* off-channel/mgmt-tx */
 void ieee80211_offchannel_stop_vifs(struct ieee80211_local *local);
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index f1cbb7c5d4ac3..4548f84451095 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -822,8 +822,8 @@ struct ieee80211_hw *ieee80211_alloc_hw_nm(size_t priv_data_len,
 		  ieee80211_dynamic_ps_disable_work);
 	timer_setup(&local->dynamic_ps_timer, ieee80211_dynamic_ps_timer, 0);
 
-	INIT_WORK(&local->sched_scan_stopped_work,
-		  ieee80211_sched_scan_stopped_work);
+	wiphy_work_init(&local->sched_scan_stopped_work,
+			ieee80211_sched_scan_stopped_work);
 
 	spin_lock_init(&local->ack_status_lock);
 	idr_init(&local->ack_status_frames);
@@ -1481,13 +1481,13 @@ void ieee80211_unregister_hw(struct ieee80211_hw *hw)
 
 	wiphy_lock(local->hw.wiphy);
 	wiphy_delayed_work_cancel(local->hw.wiphy, &local->roc_work);
+	wiphy_work_cancel(local->hw.wiphy, &local->sched_scan_stopped_work);
 	wiphy_work_cancel(local->hw.wiphy, &local->radar_detected_work);
 	wiphy_unlock(local->hw.wiphy);
 	rtnl_unlock();
 
 	cancel_work_sync(&local->restart_work);
 	cancel_work_sync(&local->reconfig_filter);
-	flush_work(&local->sched_scan_stopped_work);
 
 	ieee80211_clear_tx_pending(local);
 	rate_control_deinitialize(local);
diff --git a/net/mac80211/scan.c b/net/mac80211/scan.c
index 2117cb2a916ac..68ec2124c3db5 100644
--- a/net/mac80211/scan.c
+++ b/net/mac80211/scan.c
@@ -1422,10 +1422,11 @@ void ieee80211_sched_scan_end(struct ieee80211_local *local)
 
 	mutex_unlock(&local->mtx);
 
-	cfg80211_sched_scan_stopped(local->hw.wiphy, 0);
+	cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
 }
 
-void ieee80211_sched_scan_stopped_work(struct work_struct *work)
+void ieee80211_sched_scan_stopped_work(struct wiphy *wiphy,
+				       struct wiphy_work *work)
 {
 	struct ieee80211_local *local =
 		container_of(work, struct ieee80211_local,
@@ -1448,6 +1449,6 @@ void ieee80211_sched_scan_stopped(struct ieee80211_hw *hw)
 	if (local->in_reconfig)
 		return;
 
-	schedule_work(&local->sched_scan_stopped_work);
+	wiphy_work_queue(hw->wiphy, &local->sched_scan_stopped_work);
 }
 EXPORT_SYMBOL(ieee80211_sched_scan_stopped);