Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/net/wireless/wl3501_cs.c b/drivers/net/wireless/wl3501_cs.c
index da62220..007bf68 100644
--- a/drivers/net/wireless/wl3501_cs.c
+++ b/drivers/net/wireless/wl3501_cs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * WL3501 Wireless LAN PCMCIA Card Driver for Linux
  * Written originally for Linux 2.0.30 by Fox Chen, mhchen@golf.ccl.itri.org.tw
@@ -1225,7 +1226,6 @@
 static int wl3501_close(struct net_device *dev)
 {
 	struct wl3501_card *this = netdev_priv(dev);
-	int rc = -ENODEV;
 	unsigned long flags;
 	struct pcmcia_device *link;
 	link = this->p_dev;
@@ -1240,10 +1240,9 @@
 	/* Mask interrupts from the SUTRO */
 	wl3501_block_interrupt(this);
 
-	rc = 0;
 	printk(KERN_INFO "%s: WL3501 closed\n", dev->name);
 	spin_unlock_irqrestore(&this->lock, flags);
-	return rc;
+	return 0;
 }
 
 /**