afs: Close the rxrpc socket only after purging the servers

Close the rxrpc socket only after we've purged the server records (and also
cell and volume records which might refer to servers) so that we can give
up the callbacks on each server.

Signed-off-by: David Howells <dhowells@redhat.com>

fs/afs/main.c

@@ -96,10 +96,10 @@ error_proc:
 static void __net_exit afs_net_exit(struct afs_net *net)
 {
 	net->live = false;
-	afs_close_socket(net);
 	afs_purge_servers(net);
 	afs_vlocation_purge(net);
 	afs_cell_purge(net);
+	afs_close_socket(net);
 	afs_proc_cleanup(net);
 }