diff options
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/coretemp.c | 86 |
1 files changed, 29 insertions, 57 deletions
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index 1bcc90a20ed1..984c02334910 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -649,7 +649,7 @@ static void coretemp_device_remove(unsigned int cpu) mutex_unlock(&pdev_list_mutex); } -static void get_core_online(unsigned int cpu) +static int coretemp_cpu_online(unsigned int cpu) { struct platform_device *pdev = coretemp_get_pdev(cpu); struct cpuinfo_x86 *c = &cpu_data(cpu); @@ -662,12 +662,12 @@ static void get_core_online(unsigned int cpu) * without thermal sensors will be filtered out. */ if (!cpu_has(c, X86_FEATURE_DTHERM)) - return; + return 0; if (!pdev) { /* Check the microcode version of the CPU */ if (chk_ucode_version(cpu)) - return; + return 0; /* * Alright, we have DTS support. @@ -677,7 +677,7 @@ static void get_core_online(unsigned int cpu) */ err = coretemp_device_add(cpu); if (err) - return; + return 0; pdev = coretemp_get_pdev(cpu); /* @@ -697,9 +697,10 @@ static void get_core_online(unsigned int cpu) coretemp_add_core(pdev, cpu, 0); cpumask_set_cpu(cpu, &pdata->cpumask); + return 0; } -static void put_core_offline(unsigned int cpu) +static int coretemp_cpu_offline(unsigned int cpu) { struct platform_device *pdev = coretemp_get_pdev(cpu); struct platform_data *pd; @@ -708,12 +709,12 @@ static void put_core_offline(unsigned int cpu) /* If the physical CPU device does not exist, just return */ if (!pdev) - return; + return 0; /* The core id is too big, just return */ indx = TO_ATTR_NO(cpu); if (indx > MAX_CORE_DATA - 1) - return; + return 0; pd = platform_get_drvdata(pdev); tdata = pd->core_data[indx]; @@ -742,7 +743,7 @@ static void put_core_offline(unsigned int cpu) */ if (cpumask_empty(&pd->cpumask)) { coretemp_device_remove(cpu); - return; + return 0; } /* * Check whether this core is the target for the package @@ -755,38 +756,19 @@ static void put_core_offline(unsigned int cpu) tdata->cpu = target; mutex_unlock(&tdata->update_lock); } + return 0; } - -static int coretemp_cpu_callback(struct notifier_block *nfb, - unsigned long action, void *hcpu) -{ - unsigned int cpu = (unsigned long) hcpu; - - switch (action) { - case CPU_ONLINE: - case CPU_DOWN_FAILED: - get_core_online(cpu); - break; - case CPU_DOWN_PREPARE: - put_core_offline(cpu); - break; - } - return NOTIFY_OK; -} - -static struct notifier_block coretemp_cpu_notifier __refdata = { - .notifier_call = coretemp_cpu_callback, -}; - static const struct x86_cpu_id __initconst coretemp_ids[] = { { X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_DTHERM }, {} }; MODULE_DEVICE_TABLE(x86cpu, coretemp_ids); +static enum cpuhp_state coretemp_hp_online; + static int __init coretemp_init(void) { - int i, err; + int err; /* * CPUID.06H.EAX[0] indicates whether the CPU has thermal @@ -798,52 +780,42 @@ static int __init coretemp_init(void) err = platform_driver_register(&coretemp_driver); if (err) - goto exit; + return err; - cpu_notifier_register_begin(); - for_each_online_cpu(i) - get_core_online(i); + get_online_cpus(); + err = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "hwmon/coretemp:online", + coretemp_cpu_online, coretemp_cpu_offline); + if (err < 0) + goto exit_driver_unreg; + coretemp_hp_online = err; #ifndef CONFIG_HOTPLUG_CPU if (list_empty(&pdev_list)) { - cpu_notifier_register_done(); err = -ENODEV; - goto exit_driver_unreg; + goto exit_hp_unreg; } #endif - - __register_hotcpu_notifier(&coretemp_cpu_notifier); - cpu_notifier_register_done(); + put_online_cpus(); return 0; #ifndef CONFIG_HOTPLUG_CPU +exit_hp_unreg: + cpuhp_remove_state(coretemp_hp_online); + put_online_cpus(); +#endif exit_driver_unreg: platform_driver_unregister(&coretemp_driver); -#endif -exit: return err; } +module_init(coretemp_init) static void __exit coretemp_exit(void) { - struct pdev_entry *p, *n; - - cpu_notifier_register_begin(); - __unregister_hotcpu_notifier(&coretemp_cpu_notifier); - mutex_lock(&pdev_list_mutex); - list_for_each_entry_safe(p, n, &pdev_list, list) { - platform_device_unregister(p->pdev); - list_del(&p->list); - kfree(p); - } - mutex_unlock(&pdev_list_mutex); - cpu_notifier_register_done(); + cpuhp_remove_state(coretemp_hp_online); platform_driver_unregister(&coretemp_driver); } +module_exit(coretemp_exit) MODULE_AUTHOR("Rudolf Marek <r.marek@assembler.cz>"); MODULE_DESCRIPTION("Intel Core temperature monitor"); MODULE_LICENSE("GPL"); - -module_init(coretemp_init) -module_exit(coretemp_exit) |