[PATCH] POWERPC: idle: fix return value of __setup handler

[Randy Dunlap]

__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")
Signed-off-by: Randy Dunlap <rdunlap at infradead.org>
From: Igor Zhbanov <i.zhbanov at omprussia.ru>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3 at omprussia.ru
Cc: Arnd Bergmann <arnd at arndb.de>
Cc: Paul Mackerras <paulus at samba.org>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
---
 arch/powerpc/kernel/idle.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-next-20220310.orig/arch/powerpc/kernel/idle.c
+++ linux-next-20220310/arch/powerpc/kernel/idle.c
@@ -37,7 +37,7 @@ static int __init powersave_off(char *ar
 {
 	ppc_md.power_save = NULL;
 	cpuidle_disable = IDLE_POWERSAVE_OFF;
-	return 0;
+	return 1;
 }
 __setup("powersave=off", powersave_off);