wil6210: fix call to wil6210_disconnect during unload

Move the call to wil6210_disconnect so it will be called
before unregister_netdevice. This is because it calls
netif_carrier_off which is forbidden to call on an
unregistered net device. Calling netif_carrier_off can
add a link watch event which might be handled after
net device was freed, causing a kernel oops.
Signed-off-by: Lior David <liord@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/wil6210/netdev.c

@@ -457,16 +457,16 @@ void wil_vif_remove(struct wil6210_priv *wil, u8 mid)
 		return;
 	}
 
+	mutex_lock(&wil->mutex);
+	wil6210_disconnect(vif, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
+	mutex_unlock(&wil->mutex);
+
 	ndev = vif_to_ndev(vif);
 	/* during unregister_netdevice cfg80211_leave may perform operations
 	 * such as stop AP, disconnect, so we only clear the VIF afterwards
 	 */
 	unregister_netdevice(ndev);
 
-	mutex_lock(&wil->mutex);
-	wil6210_disconnect(vif, NULL, WLAN_REASON_DEAUTH_LEAVING, false);
-	mutex_unlock(&wil->mutex);
-
 	if (any_active && vif->mid != 0)
 		wmi_port_delete(wil, vif->mid);