Commit dbafd510 authored by Tiezhu Yang's avatar Tiezhu Yang Committed by Thomas Bogendoerfer
Browse files

MIPS: No need to check CPU 0 in cps_cpu_disable() 



After commit 9cce844a ("MIPS: CPU#0 is not hotpluggable"),
c->hotpluggable is 0 for CPU 0 and it will not generate a control
file in sysfs for this CPU:

[root@linux loongson]# cat /sys/devices/system/cpu/cpu0/online
cat: /sys/devices/system/cpu/cpu0/online: No such file or directory
[root@linux loongson]# echo 0 > /sys/devices/system/cpu/cpu0/online
bash: /sys/devices/system/cpu/cpu0/online: Permission denied

So no need to check CPU 0 in cps_cpu_disable(), just remove it.

Reported-by: default avatarliwei (GF) <liwei391@huawei.com>
Signed-off-by: default avatarTiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: default avatarThomas Bogendoerfer <tsbogend@alpha.franken.de>
parent a2d029b1

arch/mips/kernel/smp-cps.c

+0 −3
Original line number Diff line number Diff line
@@ -451,9 +451,6 @@ static int cps_cpu_disable(void) 
	unsigned cpu = smp_processor_id();

	struct core_boot_config *core_cfg;



	if (!cpu)

		return -EBUSY;



	if (!cps_pm_support_state(CPS_PM_POWER_GATED))

		return -EINVAL;