Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/misc/altera-stapl/Kconfig b/drivers/misc/altera-stapl/Kconfig
index 8a828fe..6c4c657 100644
--- a/drivers/misc/altera-stapl/Kconfig
+++ b/drivers/misc/altera-stapl/Kconfig
@@ -1,9 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-only
 comment "Altera FPGA firmware download module (requires I2C)"
 	depends on !I2C
 
 config ALTERA_STAPL
 	tristate "Altera FPGA firmware download module"
 	depends on I2C
-	default n
 	help
 	  An Altera FPGA module. Say Y when you want to support this tool.
diff --git a/drivers/misc/altera-stapl/Makefile b/drivers/misc/altera-stapl/Makefile
index 055f61e..dd0f818 100644
--- a/drivers/misc/altera-stapl/Makefile
+++ b/drivers/misc/altera-stapl/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 altera-stapl-objs = altera-lpt.o altera-jtag.o altera-comp.o altera.o
 
 obj-$(CONFIG_ALTERA_STAPL) += altera-stapl.o
diff --git a/drivers/misc/altera-stapl/altera-comp.c b/drivers/misc/altera-stapl/altera-comp.c
index 49b103b..4a63f51 100644
--- a/drivers/misc/altera-stapl/altera-comp.c
+++ b/drivers/misc/altera-stapl/altera-comp.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * altera-comp.c
  *
@@ -6,21 +7,6 @@
  * Copyright (C) Altera Corporation 1998-2001
  * Copyright (C) 2010 NetUP Inc.
  * Copyright (C) 2010 Igor M. Liplianin <liplianin@netup.ru>
- *
- * 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.
  */
 
 #include <linux/kernel.h>
diff --git a/drivers/misc/altera-stapl/altera-exprt.h b/drivers/misc/altera-stapl/altera-exprt.h
index 39c38d8..6a8b696 100644
--- a/drivers/misc/altera-stapl/altera-exprt.h
+++ b/drivers/misc/altera-stapl/altera-exprt.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * altera-exprt.h
  *
@@ -6,21 +7,6 @@
  * Copyright (C) Altera Corporation 1998-2001
  * Copyright (C) 2010 NetUP Inc.
  * Copyright (C) 2010 Igor M. Liplianin <liplianin@netup.ru>
- *
- * 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.
  */
 
 #ifndef ALTERA_EXPRT_H
diff --git a/drivers/misc/altera-stapl/altera-jtag.c b/drivers/misc/altera-stapl/altera-jtag.c
index f4bf200..27e8e0c 100644
--- a/drivers/misc/altera-stapl/altera-jtag.c
+++ b/drivers/misc/altera-stapl/altera-jtag.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * altera-jtag.c
  *
@@ -6,21 +7,6 @@
  * Copyright (C) Altera Corporation 1998-2001
  * Copyright (C) 2010 NetUP Inc.
  * Copyright (C) 2010 Igor M. Liplianin <liplianin@netup.ru>
- *
- * 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.
  */
 
 #include <linux/delay.h>
diff --git a/drivers/misc/altera-stapl/altera-jtag.h b/drivers/misc/altera-stapl/altera-jtag.h
index 2f97e36..90235b3 100644
--- a/drivers/misc/altera-stapl/altera-jtag.h
+++ b/drivers/misc/altera-stapl/altera-jtag.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * altera-jtag.h
  *
@@ -6,21 +7,6 @@
  * Copyright (C) Altera Corporation 1998-2001
  * Copyright (C) 2010 NetUP Inc.
  * Copyright (C) 2010 Igor M. Liplianin <liplianin@netup.ru>
- *
- * 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.
  */
 
 #ifndef ALTERA_JTAG_H
diff --git a/drivers/misc/altera-stapl/altera-lpt.c b/drivers/misc/altera-stapl/altera-lpt.c
index 91456a0..2b7d9cf 100644
--- a/drivers/misc/altera-stapl/altera-lpt.c
+++ b/drivers/misc/altera-stapl/altera-lpt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * altera-lpt.c
  *
@@ -6,21 +7,6 @@
  * Copyright (C) Altera Corporation 1998-2001
  * Copyright (C) 2010 NetUP Inc.
  * Copyright (C) 2010 Abylay Ospan <aospan@netup.ru>
- *
- * 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.
  */
 
 #include <linux/io.h>
diff --git a/drivers/misc/altera-stapl/altera.c b/drivers/misc/altera-stapl/altera.c
index ef83a90..25e5f24 100644
--- a/drivers/misc/altera-stapl/altera.c
+++ b/drivers/misc/altera-stapl/altera.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * altera.c
  *
@@ -6,21 +7,6 @@
  * Copyright (C) Altera Corporation 1998-2001
  * Copyright (C) 2010,2011 NetUP Inc.
  * Copyright (C) 2010,2011 Igor M. Liplianin <liplianin@netup.ru>
- *
- * 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.
  */
 
 #include <asm/unaligned.h>
@@ -2176,8 +2162,7 @@
 			key_ptr = &p[note_strings +
 					get_unaligned_be32(
 					&p[note_table + (8 * i)])];
-			if ((strncasecmp(key, key_ptr, strlen(key_ptr)) == 0) &&
-						(key != NULL)) {
+			if (key && !strncasecmp(key, key_ptr, strlen(key_ptr))) {
 				status = 0;
 
 				value_ptr = &p[note_strings +