linux-kernel - [PATCH 5.15 443/667] powerpc/idle: Fix return value of _

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Message-Id: <20220607164948.006264774@linuxfoundation.org>
Date:   Tue,  7 Jun 2022 19:01:48 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Igor Zhbanov <izh1979@...il.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 443/667] powerpc/idle: Fix return value of __setup() handler

From: Randy Dunlap <rdunlap@...radead.org>

[ Upstream commit b793a01000122d2bd133ba451a76cc135b5e162c ]

__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 powersave_off().

Fixes: 302eca184fb8 ("[POWERPC] cell: use ppc_md->power_save instead of cbe_idle_loop")
Reported-by: Igor Zhbanov <izh1979@...il.com>
Signed-off-by: Randy Dunlap <rdunlap@...radead.org>
Signed-off-by: Michael Ellerman <mpe@...erman.id.au>
Link: https://lore.kernel.org/r/20220502192925.19954-1-rdunlap@infradead.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/powerpc/kernel/idle.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c
index 1f835539fda4..f0271daa8f6a 100644
--- a/arch/powerpc/kernel/idle.c
+++ b/arch/powerpc/kernel/idle.c
@@ -37,7 +37,7 @@ static int __init powersave_off(char *arg)
 {
 	ppc_md.power_save = NULL;
 	cpuidle_disable = IDLE_POWERSAVE_OFF;
-	return 0;
+	return 1;
 }
 __setup("powersave=off", powersave_off);
 
-- 
2.35.1