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From: Miri Korenblit <miriam.rachel.korenblit@intel.com>
To: johannes@sipsolutions.net
Cc: linux-wireless@vger.kernel.org
Subject: [PATCH 3/3] wifi: mac80211: defer link switch work in reconfig
Date: Mon, 15 Apr 2024 11:27:13 +0300
Message-Id: <20240415112355.1ef1008e3a0a.I19add3f2152dcfd55a759de97b1d09265c1cde98@changeid>
In-Reply-To: <20240415082713.3822598-1-miriam.rachel.korenblit@intel.com>
References: <20240415082713.3822598-1-miriam.rachel.korenblit@intel.com>
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If a link switch work was queued, and then a restart happened, the
worker might be executed before the reconfig, and obviously it will fail
(the HW might not respond to updates etc.)
So, don't perform the switch if we are in reconfig, instead - do it
at the end of the reconfig.

Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
---
 net/mac80211/iface.c | 5 +++++
 net/mac80211/util.c  | 7 +++++++
 2 files changed, 12 insertions(+)

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index ef6b0fc82d02..dc42902e2693 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -1699,8 +1699,13 @@ static void ieee80211_activate_links_work(struct wiphy *wiphy,
 	struct ieee80211_sub_if_data *sdata =
 		container_of(work, struct ieee80211_sub_if_data,
 			     activate_links_work);
+	struct ieee80211_local *local = wiphy_priv(wiphy);
+
+	if (local->in_reconfig)
+		return;
 
 	ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links);
+	sdata->desired_active_links = 0;
 }
 
 /*
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index cda398d8f60d..0b893e958959 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -2106,6 +2106,13 @@ int ieee80211_reconfig(struct ieee80211_local *local)
 		if (sdata->restart_active_links)
 			ieee80211_set_active_links(&sdata->vif,
 						   sdata->restart_active_links);
+		/*
+		 * If a link switch was scheduled before the restart, and ran
+		 * before reconfig, it will do nothing, so re-schedule.
+		 */
+		if (sdata->desired_active_links)
+			wiphy_work_queue(sdata->local->hw.wiphy,
+					 &sdata->activate_links_work);
 	}
 
 	/* Reconfigure sched scan if it was interrupted by FW restart */
-- 
2.34.1