[PATCH 5.15 444/667] powerpc/4xx/cpm: Fix return value of __setup() handler

[Greg Kroah-Hartman]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

[ Upstream commit 5bb99fd4090fe1acfdb90a97993fcda7f8f5a3d6 ]

__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 cpm_powersave_off().

Fixes: d164f6d4f910 ("powerpc/4xx: Add suspend and idle support")
Reported-by: Igor Zhbanov <izh1979@xxxxxxxxx>
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220502192941.20955-1-rdunlap@xxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 arch/powerpc/platforms/4xx/cpm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/4xx/cpm.c b/arch/powerpc/platforms/4xx/cpm.c
index ae8b812c9202..2481e78c0423 100644
--- a/arch/powerpc/platforms/4xx/cpm.c
+++ b/arch/powerpc/platforms/4xx/cpm.c
@@ -327,6 +327,6 @@ late_initcall(cpm_init);
 static int __init cpm_powersave_off(char *arg)
 {
 	cpm.powersave_off = 1;
-	return 0;
+	return 1;
 }
 __setup("powersave=off", cpm_powersave_off);
-- 
2.35.1