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| author | Tiezhu Yang <yangtiezhu@loongson.cn> | 2020-12-15 13:07:26 +0800 |
|---|---|---|
| committer | Thomas Bogendoerfer <tsbogend@alpha.franken.de> | 2020-12-28 22:34:09 +0100 |
| commit | dbafd5105cfd9f44960bc6759a788f0290e8fba0 (patch) | |
| tree | 6f9c506334c7d33bb4c2717ca9165852d70c41d6 /arch/mips/kernel | |
| parent | a2d029b16cd8db2fd35d1c394889a38b3e73ca94 (diff) | |
| download | linux-dbafd5105cfd9f44960bc6759a788f0290e8fba0.tar.bz2 | |
MIPS: No need to check CPU 0 in cps_cpu_disable()
After commit 9cce844abf07 ("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>
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/smp-cps.c | 3 |
1 files changed, 0 insertions, 3 deletions
diff --git a/arch/mips/kernel/smp-cps.c b/arch/mips/kernel/smp-cps.c index 8b027c72b8ef..bcd6a944b839 100644 --- a/arch/mips/kernel/smp-cps.c +++ b/arch/mips/kernel/smp-cps.c @@ -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; |