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

After commit 9cce844abf ("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: liwei (GF) <liwei391@huawei.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Tiezhu Yang 2020-12-15 13:07:26 +08:00 committed by Thomas Bogendoerfer
parent a2d029b16c
commit dbafd5105c
1 changed files with 0 additions and 3 deletions
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3
arch/mips/kernel/smp-cps.c
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@ -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;