wifi: cfg80211: use cfg80211_leave() in iftype change

[ Upstream commit 7a27b73 ]

When changing the interface type, all activity on the interface has
to be stopped first. This was done independent of existing code in
cfg80211_leave(), so didn't handle e.g. background radar detection.
Use cfg80211_leave() to handle it the same way.

Note that cfg80211_leave() behaves slightly differently for IBSS in
wireless extensions, it won't send an event in that case. We could
handle that, but since nl80211 was used to change the type, IBSS is
rare, and wext is already a corner case, it doesn't seem worth it.

Link: https://patch.msgid.link/20251121174021.922ef48ce007.I970c8514252ef8a864a7fbdab9591b71031dee03@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
(cherry picked from commit 0283fac52b42712196e23509283f634ffa6c3b65)
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>

Author: jmberg-intel

net/wireless/util.c

@@ -1203,28 +1203,7 @@ int cfg80211_change_iface(struct cfg80211_registered_device *rdev,
 		dev->ieee80211_ptr->use_4addr = false;
 		rdev_set_qos_map(rdev, dev, NULL);
 
-		switch (otype) {
-		case NL80211_IFTYPE_AP:
-		case NL80211_IFTYPE_P2P_GO:
-			cfg80211_stop_ap(rdev, dev, -1, true);
-			break;
-		case NL80211_IFTYPE_ADHOC:
-			cfg80211_leave_ibss(rdev, dev, false);
-			break;
-		case NL80211_IFTYPE_STATION:
-		case NL80211_IFTYPE_P2P_CLIENT:
-			cfg80211_disconnect(rdev, dev,
-					    WLAN_REASON_DEAUTH_LEAVING, true);
-			break;
-		case NL80211_IFTYPE_MESH_POINT:
-			/* mesh should be handled? */
-			break;
-		case NL80211_IFTYPE_OCB:
-			cfg80211_leave_ocb(rdev, dev);
-			break;
-		default:
-			break;
-		}
+		cfg80211_leave(rdev, dev->ieee80211_ptr);
 
 		cfg80211_process_rdev_events(rdev);
 		cfg80211_mlme_purge_registrations(dev->ieee80211_ptr);