[PATCH v2] POWERPC: idle: fix return value of __setup handler

[PATCH v2] 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@infradead.org>
Reported-by: Igor Zhbanov <izh1979@gmail.com>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
v2: change From: Igor to Reported-by: Igor
    update Igor's email address

 arch/powerpc/kernel/idle.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/powerpc/kernel/idle.c
+++ b/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);
 

[PATCH v2] 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@infradead.org>
Reported-by: Igor Zhbanov <izh1979@gmail.com>
Link: lore.kernel.org/r/64644a2f-4a20-bab3-1e15-3b2cdd0defe3@omprussia.ru
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
---
v2: change From: Igor to Reported-by: Igor
    update Igor's email address

 arch/powerpc/kernel/idle.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/powerpc/kernel/idle.c
+++ b/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);
 

Re: [PATCH v2] POWERPC: idle: fix return value of __setup handler

[Michael Ellerman]

On Mon, 2 May 2022 12:29:25 -0700, Randy Dunlap wrote:
> __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().
> 
> [...]

Applied to powerpc/next.

[1/1] POWERPC: idle: fix return value of __setup handler
      https://git.kernel.org/powerpc/c/b793a01000122d2bd133ba451a76cc135b5e162c

cheers

Re: [PATCH v2] POWERPC: idle: fix return value of __setup handler

[Michael Ellerman]

On Mon, 2 May 2022 12:29:25 -0700, Randy Dunlap wrote:
> __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().
> 
> [...]

Applied to powerpc/next.

[1/1] POWERPC: idle: fix return value of __setup handler
      https://git.kernel.org/powerpc/c/b793a01000122d2bd133ba451a76cc135b5e162c

cheers