---

yaml
---
r: 71135
b: refs/heads/master
c: d435d86
h: refs/heads/master
i:
  71133: d3ef563
  71131: 3a48c27
  71127: 51fef7b
  71119: 24838ef
  71103: 6166835
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 881a841f4ae268207c29721532406ad061e41857
+refs/heads/master: d435d862baca3e25e5eec236762a43251b1e7ffc

trunk/arch/x86/kernel/mce_64.c

@@ -802,16 +802,29 @@ static __cpuinit int mce_create_device(unsigned int 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;
 }
 
@@ -823,26 +836,28 @@ 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. */
 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 +872,13 @@ 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);