linux-kernel - [RFC PATCH v2 3/3] wifi: cfg80211: move scan done work to cfg80211 workqueue

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Message-Id: <20230510220918.dceb0eba07bb.I0490b5768769e62db2448e3f439cdf8a3c2df892@changeid>
Date:   Wed, 10 May 2023 22:12:05 +0200
From:   Johannes Berg <johannes@...solutions.net>
To:     linux-kernel@...r.kernel.org
Cc:     linux-wireless@...r.kernel.org, Tejun Heo <tj@...nel.org>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        Johannes Berg <johannes.berg@...el.com>
Subject: [RFC PATCH v2 3/3] wifi: cfg80211: move scan done work to cfg80211 workqueue

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

Now that we have the cfg80211 workqueue, move the scan_done work
to it as an example.

Signed-off-by: Johannes Berg <johannes.berg@...el.com>
---
v2:
 - use the new version of the cfg80211 patch
---
 net/wireless/core.c |  3 +--
 net/wireless/core.h |  4 ++--
 net/wireless/scan.c | 14 ++++----------
 3 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/net/wireless/core.c b/net/wireless/core.c
index 357fd5425bff..3671a50796c2 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -517,7 +517,7 @@ struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
 	spin_lock_init(&rdev->bss_lock);
 	INIT_LIST_HEAD(&rdev->bss_list);
 	INIT_LIST_HEAD(&rdev->sched_scan_req_list);
-	INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
+	wiphy_work_init(&rdev->scan_done_wk, __cfg80211_scan_done);
 	INIT_DELAYED_WORK(&rdev->dfs_update_channels_wk,
 			  cfg80211_dfs_channels_update_work);
 #ifdef CONFIG_CFG80211_WEXT
@@ -1106,7 +1106,6 @@ void wiphy_unregister(struct wiphy *wiphy)
 	 */
 	flush_workqueue(rdev->wq);
 
-	flush_work(&rdev->scan_done_wk);
 	cancel_work_sync(&rdev->conn_work);
 	flush_work(&rdev->event_work);
 	cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
diff --git a/net/wireless/core.h b/net/wireless/core.h
index adb45fa38acb..cbd864224856 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -75,7 +75,7 @@ struct cfg80211_registered_device {
 	struct sk_buff *scan_msg;
 	struct list_head sched_scan_req_list;
 	time64_t suspend_at;
-	struct work_struct scan_done_wk;
+	struct wiphy_work scan_done_wk;
 
 	struct genl_info *cur_cmd_info;
 
@@ -441,7 +441,7 @@ bool cfg80211_valid_key_idx(struct cfg80211_registered_device *rdev,
 int cfg80211_validate_key_settings(struct cfg80211_registered_device *rdev,
 				   struct key_params *params, int key_idx,
 				   bool pairwise, const u8 *mac_addr);
-void __cfg80211_scan_done(struct work_struct *wk);
+void __cfg80211_scan_done(struct wiphy *wiphy, struct wiphy_work *wk);
 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
 			   bool send_message);
 void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev,
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 790bc31cf82e..752eae5e0a00 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1000,16 +1000,9 @@ void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
 		nl80211_send_scan_msg(rdev, msg);
 }
 
-void __cfg80211_scan_done(struct work_struct *wk)
+void __cfg80211_scan_done(struct wiphy *wiphy, struct wiphy_work *wk)
 {
-	struct cfg80211_registered_device *rdev;
-
-	rdev = container_of(wk, struct cfg80211_registered_device,
-			    scan_done_wk);
-
-	wiphy_lock(&rdev->wiphy);
-	___cfg80211_scan_done(rdev, true);
-	wiphy_unlock(&rdev->wiphy);
+	___cfg80211_scan_done(wiphy_to_rdev(wiphy), true);
 }
 
 void cfg80211_scan_done(struct cfg80211_scan_request *request,
@@ -1035,7 +1028,8 @@ void cfg80211_scan_done(struct cfg80211_scan_request *request,
 	}
 
 	request->notified = true;
-	queue_work(cfg80211_wq, &wiphy_to_rdev(request->wiphy)->scan_done_wk);
+	wiphy_work_queue(request->wiphy,
+			 &wiphy_to_rdev(request->wiphy)->scan_done_wk);
 }
 EXPORT_SYMBOL(cfg80211_scan_done);
 
-- 
2.40.1