1 files changed, 30 insertions, 2 deletions

diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index 2988da150ed6..05344af50734 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -53,6 +53,7 @@ struct coretemp_data {
         struct mutex update_lock;
         const char *name;
         u32 id;
+        u16 core_id;
         char valid;             /* zero until following fields are valid */
         unsigned long last_updated;     /* in jiffies */
         int temp;
@@ -75,7 +76,7 @@ static ssize_t show_name(struct device *dev, struct device_attribute
         if (attr->index == SHOW_NAME)
                 ret = sprintf(buf, "%s\n", data->name);
         else    /* show label */
-                ret = sprintf(buf, "Core %d\n", data->id);
+                ret = sprintf(buf, "Core %d\n", data->core_id);
         return ret;
 }
 
@@ -304,6 +305,9 @@ static int __devinit coretemp_probe(struct platform_device *pdev)
         }
 
         data->id = pdev->id;
+#ifdef CONFIG_SMP
+        data->core_id = c->cpu_core_id;
+#endif
         data->name = "coretemp";
         mutex_init(&data->update_lock);
 
@@ -405,6 +409,10 @@ 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);
@@ -415,6 +423,22 @@ 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) {
@@ -438,7 +462,10 @@ 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);
 
@@ -449,6 +476,7 @@ exit_device_free:
 exit_device_put:
         platform_device_put(pdev);
 exit:
+        mutex_unlock(&pdev_list_mutex);
         return err;
 }