P2P: Fix wpas_remove_persistent_peer() to use P2P mgmt interface

The function used wpa_s->parent->conf to iterate the P2P networks and
update the configuration file. However, wpa_s->parent is not
necessarily the interface used to manage the P2P Device operations.

Fix this by accessing the configuration file of the interface
initialized to manage the P2P Device operations.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>

wpa_supplicant/p2p_supplicant.c

@@ -2831,6 +2831,7 @@ static void wpas_remove_persistent_peer(struct wpa_supplicant *wpa_s,
 					const u8 *peer, int inv)
 {
 	size_t i;
+	struct wpa_supplicant *p2p_wpa_s = wpa_s->global->p2p_init_wpa_s;
 
 	if (ssid == NULL)
 		return;
@@ -2860,8 +2861,8 @@ static void wpas_remove_persistent_peer(struct wpa_supplicant *wpa_s,
 		   ssid->p2p_client_list + (i + 1) * 2 * ETH_ALEN,
 		   (ssid->num_p2p_clients - i - 1) * 2 * ETH_ALEN);
 	ssid->num_p2p_clients--;
-	if (wpa_s->parent->conf->update_config &&
-	    wpa_config_write(wpa_s->parent->confname, wpa_s->parent->conf))
+	if (p2p_wpa_s->conf->update_config &&
+	    wpa_config_write(p2p_wpa_s->confname, p2p_wpa_s->conf))
 		wpa_printf(MSG_DEBUG, "P2P: Failed to update configuration");
 }