Merge branch 'linus' into x86/doc

1 files changed, 18 insertions, 9 deletions

diff --git a/drivers/hwmon/ibmaem.c b/drivers/hwmon/ibmaem.c
index c9416e657487..0f70dc204105 100644
--- a/drivers/hwmon/ibmaem.c
+++ b/drivers/hwmon/ibmaem.c
@@ -1,6 +1,6 @@
 /*
- * A hwmon driver for the IBM Active Energy Manager temperature/power sensors
- * and capping functionality.
+ * A hwmon driver for the IBM System Director Active Energy Manager (AEM)
+ * temperature/power/energy sensors and capping functionality.
  * Copyright (C) 2008 IBM
  *
  * Author: Darrick J. Wong <djwong@us.ibm.com>
@@ -463,12 +463,18 @@ static int aem_read_sensor(struct aem_data *data, u8 elt, u8 reg,
 }
 
 /* Update AEM energy registers */
+static void update_aem_energy_one(struct aem_data *data, int which)
+{
+	aem_read_sensor(data, AEM_ENERGY_ELEMENT, which,
+			&data->energy[which], 8);
+}
+
 static void update_aem_energy(struct aem_data *data)
 {
-	aem_read_sensor(data, AEM_ENERGY_ELEMENT, 0, &data->energy[0], 8);
+	update_aem_energy_one(data, 0);
 	if (data->ver_major < 2)
 		return;
-	aem_read_sensor(data, AEM_ENERGY_ELEMENT, 1, &data->energy[1], 8);
+	update_aem_energy_one(data, 1);
 }
 
 /* Update all AEM1 sensors */
@@ -676,7 +682,8 @@ static int aem_find_aem2(struct aem_ipmi_data *data,
 		return -ETIMEDOUT;
 
 	if (data->rx_result || data->rx_msg_len != sizeof(*fi_resp) ||
-	    memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)))
+	    memcmp(&fi_resp->id, &system_x_id, sizeof(system_x_id)) ||
+	    fi_resp->num_instances <= instance_num)
 		return -ENOENT;
 
 	return 0;
@@ -849,7 +856,7 @@ static ssize_t aem_show_power(struct device *dev,
 	struct timespec b, a;
 
 	mutex_lock(&data->lock);
-	update_aem_energy(data);
+	update_aem_energy_one(data, attr->index);
 	getnstimeofday(&b);
 	before = data->energy[attr->index];
 
@@ -861,7 +868,7 @@ static ssize_t aem_show_power(struct device *dev,
 		return 0;
 	}
 
-	update_aem_energy(data);
+	update_aem_energy_one(data, attr->index);
 	getnstimeofday(&a);
 	after = data->energy[attr->index];
 	mutex_unlock(&data->lock);
@@ -880,7 +887,9 @@ static ssize_t aem_show_energy(struct device *dev,
 {
 	struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
 	struct aem_data *a = dev_get_drvdata(dev);
-	a->update(a);
+	mutex_lock(&a->lock);
+	update_aem_energy_one(a, attr->index);
+	mutex_unlock(&a->lock);
 
 	return sprintf(buf, "%llu\n",
 			(unsigned long long)a->energy[attr->index] * 1000);
@@ -1104,7 +1113,7 @@ static void __exit aem_exit(void)
 }
 
 MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
-MODULE_DESCRIPTION("IBM Active Energy Manager power/temp sensor driver");
+MODULE_DESCRIPTION("IBM AEM power/temp/energy sensor driver");
 MODULE_LICENSE("GPL");
 
 module_init(aem_init);