wifi: mac80211: use wiphy_hrtimer_work for ml_reconf_work

The work item may be scheduled relatively far in the future. As the
event happens at a specific point in time, the normal timer accuracy is
not sufficient in that case.

Switch to use wiphy_hrtimer_work so that the accuracy is sufficient.

CC: stable@vger.kernel.org
Fixes: 8eb8dd2 ("wifi: mac80211: Support link removal using Reconfiguration ML element")
Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20251028125710.24a7b54e9e37.I063c5c15bf7672f94cea75f83e486a3ca52d098f@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

Author: benzea

net/mac80211/ieee80211_i.h

@@ -612,7 +612,7 @@ struct ieee80211_if_managed {
 	u8 *assoc_req_ies;
 	size_t assoc_req_ies_len;
 
-	struct wiphy_delayed_work ml_reconf_work;
+	struct wiphy_hrtimer_work ml_reconf_work;
 	u16 removed_links;
 
 	/* TID-to-link mapping support */

net/mac80211/mlme.c

@@ -4249,7 +4249,7 @@ static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
 				  &ifmgd->neg_ttlm_timeout_work);
 
 	sdata->u.mgd.removed_links = 0;
-	wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
+	wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy,
 				  &sdata->u.mgd.ml_reconf_work);
 
 	wiphy_work_cancel(sdata->local->hw.wiphy,
@@ -6876,7 +6876,7 @@ static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata,
 		/* In case the removal was cancelled, abort it */
 		if (sdata->u.mgd.removed_links) {
 			sdata->u.mgd.removed_links = 0;
-			wiphy_delayed_work_cancel(sdata->local->hw.wiphy,
+			wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy,
 						  &sdata->u.mgd.ml_reconf_work);
 		}
 		return;
@@ -6906,9 +6906,9 @@ static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata,
 	}
 
 	sdata->u.mgd.removed_links = removed_links;
-	wiphy_delayed_work_queue(sdata->local->hw.wiphy,
+	wiphy_hrtimer_work_queue(sdata->local->hw.wiphy,
 				 &sdata->u.mgd.ml_reconf_work,
-				 TU_TO_JIFFIES(delay));
+				 us_to_ktime(ieee80211_tu_to_usec(delay)));
 }
 
 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata,
@@ -8793,7 +8793,7 @@ void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
 			ieee80211_csa_connection_drop_work);
 	wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work,
 				ieee80211_tdls_peer_del_work);
-	wiphy_delayed_work_init(&ifmgd->ml_reconf_work,
+	wiphy_hrtimer_work_init(&ifmgd->ml_reconf_work,
 				ieee80211_ml_reconf_work);
 	wiphy_delayed_work_init(&ifmgd->reconf.wk,
 				ieee80211_ml_sta_reconf_timeout);