diff options
Diffstat (limited to 'arch/x86/kernel/mce_64.c')
| -rw-r--r-- | arch/x86/kernel/mce_64.c | 46 |
1 files changed, 33 insertions, 13 deletions
diff --git a/arch/x86/kernel/mce_64.c b/arch/x86/kernel/mce_64.c index 8ca8f864896..07bbfe7aa7f 100644 --- a/arch/x86/kernel/mce_64.c +++ b/arch/x86/kernel/mce_64.c @@ -320,7 +320,7 @@ void do_machine_check(struct pt_regs * regs, long error_code) #ifdef CONFIG_X86_MCE_INTEL /*** * mce_log_therm_throt_event - Logs the thermal throttling event to mcelog - * @cpu: The CPU on which the event occured. + * @cpu: The CPU on which the event occurred. * @status: Event status information * * This function should be called by the thermal interrupt after the @@ -688,7 +688,7 @@ static int __init mcheck_disable(char *str) return 1; } -/* mce=off disables machine check. Note you can reenable it later +/* mce=off disables machine check. Note you can re-enable it later using sysfs. mce=TOLERANCELEVEL (number, see above) mce=bootlog Log MCEs from before booting. Disabled by default on AMD. @@ -799,19 +799,33 @@ static __cpuinit int mce_create_device(unsigned int cpu) { int err; int i; - if (!mce_available(&cpu_data[cpu])) + + if (!mce_available(&cpu_data(cpu))) return -EIO; + memset(&per_cpu(device_mce, cpu).kobj, 0, sizeof(struct kobject)); per_cpu(device_mce,cpu).id = cpu; per_cpu(device_mce,cpu).cls = &mce_sysclass; err = sysdev_register(&per_cpu(device_mce,cpu)); + if (err) + return err; + + for (i = 0; mce_attributes[i]; i++) { + err = sysdev_create_file(&per_cpu(device_mce,cpu), + mce_attributes[i]); + if (err) + goto error; + } - if (!err) { - for (i = 0; mce_attributes[i]; i++) - sysdev_create_file(&per_cpu(device_mce,cpu), - mce_attributes[i]); + return 0; +error: + while (i--) { + sysdev_remove_file(&per_cpu(device_mce,cpu), + mce_attributes[i]); } + sysdev_unregister(&per_cpu(device_mce,cpu)); + return err; } @@ -823,7 +837,6 @@ static void mce_remove_device(unsigned int cpu) sysdev_remove_file(&per_cpu(device_mce,cpu), mce_attributes[i]); sysdev_unregister(&per_cpu(device_mce,cpu)); - memset(&per_cpu(device_mce, cpu).kobj, 0, sizeof(struct kobject)); } /* Get notified when a cpu comes on/off. Be hotplug friendly. */ @@ -831,18 +844,21 @@ static int mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu) { unsigned int cpu = (unsigned long)hcpu; + int err = 0; switch (action) { - case CPU_ONLINE: - case CPU_ONLINE_FROZEN: - mce_create_device(cpu); + case CPU_UP_PREPARE: + case CPU_UP_PREPARE_FROZEN: + err = mce_create_device(cpu); break; + case CPU_UP_CANCELED: + case CPU_UP_CANCELED_FROZEN: case CPU_DEAD: case CPU_DEAD_FROZEN: mce_remove_device(cpu); break; } - return NOTIFY_OK; + return err ? NOTIFY_BAD : NOTIFY_OK; } static struct notifier_block mce_cpu_notifier = { @@ -857,9 +873,13 @@ static __init int mce_init_device(void) if (!mce_available(&boot_cpu_data)) return -EIO; err = sysdev_class_register(&mce_sysclass); + if (err) + return err; for_each_online_cpu(i) { - mce_create_device(i); + err = mce_create_device(i); + if (err) + return err; } register_hotcpu_notifier(&mce_cpu_notifier); |