Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/net/wan/cosa.c b/drivers/net/wan/cosa.c
index f6b000d..af53915 100644
--- a/drivers/net/wan/cosa.c
+++ b/drivers/net/wan/cosa.c
@@ -1,22 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* $Id: cosa.c,v 1.31 2000/03/08 17:47:16 kas Exp $ */
 
 /*
  *  Copyright (C) 1995-1997  Jan "Yenya" Kasprzak <kas@fi.muni.cz>
  *  Generic HDLC port Copyright (C) 2008 Krzysztof Halasa <khc@pm.waw.pl>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 /*
@@ -769,7 +756,7 @@
 		chan->netdev->stats.tx_aborted_errors++;
 		return 1;
 	}
-	dev_kfree_skb_irq(chan->tx_skb);
+	dev_consume_skb_irq(chan->tx_skb);
 	chan->tx_skb = NULL;
 	chan->netdev->stats.tx_packets++;
 	chan->netdev->stats.tx_bytes += size;