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authorToshi Kani <toshi.kani@hp.com>2013-08-30 02:22:06 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2013-09-25 10:38:09 +0200
commitf6913f990273a1fbfc0ec501d4998faa4f1ebae6 (patch)
tree2f184030b3c2ea5949da5f622a5a81933e4cd8d2 /arch
parentLinux 3.12-rc2 (diff)
downloadlinux-f6913f990273a1fbfc0ec501d4998faa4f1ebae6.tar.xz
linux-f6913f990273a1fbfc0ec501d4998faa4f1ebae6.zip
hotplug / x86: Fix online state in cpu0 debug interface
_debug_hotplug_cpu() is a debug interface that puts cpu0 offline during boot-up when CONFIG_DEBUG_HOTPLUG_CPU0 is set. After cpu0 is put offline in this interface, however, /sys/devices/system/cpu/cpu0/online still shows 1 (online). This patch fixes _debug_hotplug_cpu() to update dev->offline when CPU online/offline operation succeeded. Signed-off-by: Toshi Kani <toshi.kani@hp.com> Acked-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/topology.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/x86/kernel/topology.c b/arch/x86/kernel/topology.c
index 6e60b5fe2244..5823bbd668f4 100644
--- a/arch/x86/kernel/topology.c
+++ b/arch/x86/kernel/topology.c
@@ -72,16 +72,19 @@ int __ref _debug_hotplug_cpu(int cpu, int action)
ret = cpu_down(cpu);
if (!ret) {
pr_info("CPU %u is now offline\n", cpu);
+ dev->offline = true;
kobject_uevent(&dev->kobj, KOBJ_OFFLINE);
} else
pr_debug("Can't offline CPU%d.\n", cpu);
break;
case 1:
ret = cpu_up(cpu);
- if (!ret)
+ if (!ret) {
+ dev->offline = false;
kobject_uevent(&dev->kobj, KOBJ_ONLINE);
- else
+ } else {
pr_debug("Can't online CPU%d.\n", cpu);
+ }
break;
default:
ret = -EINVAL;