netdev - [PATCH] MIPS: RB532: fix return value of _

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Date:   Fri, 11 Mar 2022 20:20:26 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     netdev@...r.kernel.org
Cc:     patches@...ts.linux.dev, Randy Dunlap <rdunlap@...radead.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        linux-mips@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Phil Sutter <n0-1@...ewrt.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Daniel Walter <dwalter@...gle.com>
Subject: [PATCH] MIPS: RB532: fix return value of __setup handler

__setup() handlers should return 1 to obsolete_checksetup() in
init/main.c to indicate that the boot option has been handled.
A return of 0 causes the boot option/value to be listed as an Unknown
kernel parameter and added to init's (limited) argument or environment
strings. Also, error return codes don't mean anything to
obsolete_checksetup() -- only non-zero (usually 1) or zero.
So return 1 from setup_kmac().

Fixes: 9e21c7e40b7e ("MIPS: RB532: Replace parse_mac_addr() with mac_pton().")
Fixes: 73b4390fb234 ("[MIPS] Routerboard 532: Support for base system")
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
From: Igor Zhbanov <i.zhbanov@...russia.ru>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@...russia.ru
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: linux-mips@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Phil Sutter <n0-1@...ewrt.org>
Cc: Florian Fainelli <f.fainelli@...il.com>
Cc: Ralf Baechle <ralf@...ux-mips.org>
Cc: Daniel Walter <dwalter@...gle.com>
---
 arch/mips/rb532/devices.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

--- linux-next-20220309.orig/arch/mips/rb532/devices.c
+++ linux-next-20220309/arch/mips/rb532/devices.c
@@ -301,11 +301,9 @@ static int __init plat_setup_devices(voi
 static int __init setup_kmac(char *s)
 {
 	printk(KERN_INFO "korina mac = %s\n", s);
-	if (!mac_pton(s, korina_dev0_data.mac)) {
+	if (!mac_pton(s, korina_dev0_data.mac))
 		printk(KERN_ERR "Invalid mac\n");
-		return -EINVAL;
-	}
-	return 0;
+	return 1;
 }
 
 __setup("kmac=", setup_kmac);