diff options
| author | Jean Delvare <khali@linux-fr.org> | 2010-07-09 16:22:49 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-02 10:20:43 -0700 |
| commit | 696f12076eb2d2217e67dcae62c8a436b4ec524b (patch) | |
| tree | 5f0f7dc3319b9646d8126dc5a19bda57490cdfaa /drivers/hwmon | |
| parent | a4a3b1fb8a7e81648884840c3aabe38458202618 (diff) | |
hwmon: (coretemp) Skip duplicate CPU entries
commit d883b9f0977269d519469da72faec6a7f72cb489 upstream.
On hyper-threaded CPUs, each core appears twice in the CPU list. Skip
the second entry to avoid duplicate sensors.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Huaxu Wan <huaxu.wan@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/coretemp.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c index bb4a7f4d1605..585219167fa7 100644 --- a/drivers/hwmon/coretemp.c +++ b/drivers/hwmon/coretemp.c @@ -356,6 +356,10 @@ struct pdev_entry { struct list_head list; struct platform_device *pdev; unsigned int cpu; +#ifdef CONFIG_SMP + u16 phys_proc_id; + u16 cpu_core_id; +#endif }; static LIST_HEAD(pdev_list); @@ -366,6 +370,22 @@ static int __cpuinit coretemp_device_add(unsigned int cpu) int err; struct platform_device *pdev; struct pdev_entry *pdev_entry; +#ifdef CONFIG_SMP + struct cpuinfo_x86 *c = &cpu_data(cpu); +#endif + + mutex_lock(&pdev_list_mutex); + +#ifdef CONFIG_SMP + /* Skip second HT entry of each core */ + list_for_each_entry(pdev_entry, &pdev_list, list) { + if (c->phys_proc_id == pdev_entry->phys_proc_id && + c->cpu_core_id == pdev_entry->cpu_core_id) { + err = 0; /* Not an error */ + goto exit; + } + } +#endif pdev = platform_device_alloc(DRVNAME, cpu); if (!pdev) { @@ -389,7 +409,10 @@ static int __cpuinit coretemp_device_add(unsigned int cpu) pdev_entry->pdev = pdev; pdev_entry->cpu = cpu; - mutex_lock(&pdev_list_mutex); +#ifdef CONFIG_SMP + pdev_entry->phys_proc_id = c->phys_proc_id; + pdev_entry->cpu_core_id = c->cpu_core_id; +#endif list_add_tail(&pdev_entry->list, &pdev_list); mutex_unlock(&pdev_list_mutex); @@ -400,6 +423,7 @@ exit_device_free: exit_device_put: platform_device_put(pdev); exit: + mutex_unlock(&pdev_list_mutex); return err; } |