linux/drivers/hwmon/ibmpex.c
Kees Cook 6396bb2215 treewide: kzalloc() -> kcalloc()
The kzalloc() function has a 2-factor argument form, kcalloc(). This
patch replaces cases of:

        kzalloc(a * b, gfp)

with:
        kcalloc(a * b, gfp)

as well as handling cases of:

        kzalloc(a * b * c, gfp)

with:

        kzalloc(array3_size(a, b, c), gfp)

as it's slightly less ugly than:

        kzalloc_array(array_size(a, b), c, gfp)

This does, however, attempt to ignore constant size factors like:

        kzalloc(4 * 1024, gfp)

though any constants defined via macros get caught up in the conversion.

Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.

The Coccinelle script used for this was:

// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@

(
  kzalloc(
-	(sizeof(TYPE)) * E
+	sizeof(TYPE) * E
  , ...)
|
  kzalloc(
-	(sizeof(THING)) * E
+	sizeof(THING) * E
  , ...)
)

// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@

(
  kzalloc(
-	sizeof(u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * (COUNT)
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(__u8) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(char) * COUNT
+	COUNT
  , ...)
|
  kzalloc(
-	sizeof(unsigned char) * COUNT
+	COUNT
  , ...)
)

// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@

(
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_ID)
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_ID
+	COUNT_ID, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (COUNT_CONST)
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * COUNT_CONST
+	COUNT_CONST, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_ID)
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_ID
+	COUNT_ID, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (COUNT_CONST)
+	COUNT_CONST, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * COUNT_CONST
+	COUNT_CONST, sizeof(THING)
  , ...)
)

// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@

- kzalloc
+ kcalloc
  (
-	SIZE * COUNT
+	COUNT, SIZE
  , ...)

// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@

(
  kzalloc(
-	sizeof(TYPE) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(TYPE) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(TYPE))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * (COUNT) * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * (STRIDE)
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
|
  kzalloc(
-	sizeof(THING) * COUNT * STRIDE
+	array3_size(COUNT, STRIDE, sizeof(THING))
  , ...)
)

// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@

(
  kzalloc(
-	sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(THING1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(THING1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * COUNT
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
|
  kzalloc(
-	sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+	array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
  , ...)
)

// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@

(
  kzalloc(
-	(COUNT) * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * STRIDE * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	(COUNT) * (STRIDE) * (SIZE)
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
|
  kzalloc(
-	COUNT * STRIDE * SIZE
+	array3_size(COUNT, STRIDE, SIZE)
  , ...)
)

// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@

(
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(
-	(E1) * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * E3
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	(E1) * (E2) * (E3)
+	array3_size(E1, E2, E3)
  , ...)
|
  kzalloc(
-	E1 * E2 * E3
+	array3_size(E1, E2, E3)
  , ...)
)

// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@

(
  kzalloc(sizeof(THING) * C2, ...)
|
  kzalloc(sizeof(TYPE) * C2, ...)
|
  kzalloc(C1 * C2 * C3, ...)
|
  kzalloc(C1 * C2, ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * (E2)
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(TYPE) * E2
+	E2, sizeof(TYPE)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * (E2)
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	sizeof(THING) * E2
+	E2, sizeof(THING)
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * E2
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	(E1) * (E2)
+	E1, E2
  , ...)
|
- kzalloc
+ kcalloc
  (
-	E1 * E2
+	E1, E2
  , ...)
)

Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-12 16:19:22 -07:00

616 lines
15 KiB
C

/*
* A hwmon driver for the IBM PowerExecutive temperature/power sensors
* Copyright (C) 2007 IBM
*
* Author: Darrick J. Wong <darrick.wong@oracle.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/ipmi.h>
#include <linux/module.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/jiffies.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/err.h>
#define REFRESH_INTERVAL (2 * HZ)
#define DRVNAME "ibmpex"
#define PEX_GET_VERSION 1
#define PEX_GET_SENSOR_COUNT 2
#define PEX_GET_SENSOR_NAME 3
#define PEX_RESET_HIGH_LOW 4
#define PEX_GET_SENSOR_DATA 6
#define PEX_NET_FUNCTION 0x3A
#define PEX_COMMAND 0x3C
static inline u16 extract_value(const char *data, int offset)
{
return be16_to_cpup((__be16 *)&data[offset]);
}
#define TEMP_SENSOR 1
#define POWER_SENSOR 2
#define PEX_SENSOR_TYPE_LEN 3
static u8 const power_sensor_sig[] = {0x70, 0x77, 0x72};
static u8 const temp_sensor_sig[] = {0x74, 0x65, 0x6D};
#define PEX_MULT_LEN 2
static u8 const watt_sensor_sig[] = {0x41, 0x43};
#define PEX_NUM_SENSOR_FUNCS 3
static const char * const sensor_name_suffixes[] = {
"",
"_lowest",
"_highest"
};
static void ibmpex_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data);
static void ibmpex_register_bmc(int iface, struct device *dev);
static void ibmpex_bmc_gone(int iface);
struct ibmpex_sensor_data {
int in_use;
s16 values[PEX_NUM_SENSOR_FUNCS];
int multiplier;
struct sensor_device_attribute_2 attr[PEX_NUM_SENSOR_FUNCS];
};
struct ibmpex_bmc_data {
struct list_head list;
struct device *hwmon_dev;
struct device *bmc_device;
struct mutex lock;
char valid;
unsigned long last_updated; /* In jiffies */
struct ipmi_addr address;
struct completion read_complete;
ipmi_user_t user;
int interface;
struct kernel_ipmi_msg tx_message;
unsigned char tx_msg_data[IPMI_MAX_MSG_LENGTH];
long tx_msgid;
unsigned char rx_msg_data[IPMI_MAX_MSG_LENGTH];
unsigned long rx_msg_len;
unsigned char rx_result;
int rx_recv_type;
unsigned char sensor_major;
unsigned char sensor_minor;
unsigned char num_sensors;
struct ibmpex_sensor_data *sensors;
};
struct ibmpex_driver_data {
struct list_head bmc_data;
struct ipmi_smi_watcher bmc_events;
struct ipmi_user_hndl ipmi_hndlrs;
};
static struct ibmpex_driver_data driver_data = {
.bmc_data = LIST_HEAD_INIT(driver_data.bmc_data),
.bmc_events = {
.owner = THIS_MODULE,
.new_smi = ibmpex_register_bmc,
.smi_gone = ibmpex_bmc_gone,
},
.ipmi_hndlrs = {
.ipmi_recv_hndl = ibmpex_msg_handler,
},
};
static int ibmpex_send_message(struct ibmpex_bmc_data *data)
{
int err;
err = ipmi_validate_addr(&data->address, sizeof(data->address));
if (err)
goto out;
data->tx_msgid++;
err = ipmi_request_settime(data->user, &data->address, data->tx_msgid,
&data->tx_message, data, 0, 0, 0);
if (err)
goto out1;
return 0;
out1:
dev_err(data->bmc_device, "request_settime=%x\n", err);
return err;
out:
dev_err(data->bmc_device, "validate_addr=%x\n", err);
return err;
}
static int ibmpex_ver_check(struct ibmpex_bmc_data *data)
{
data->tx_msg_data[0] = PEX_GET_VERSION;
data->tx_message.data_len = 1;
ibmpex_send_message(data);
wait_for_completion(&data->read_complete);
if (data->rx_result || data->rx_msg_len != 6)
return -ENOENT;
data->sensor_major = data->rx_msg_data[0];
data->sensor_minor = data->rx_msg_data[1];
dev_info(data->bmc_device,
"Found BMC with sensor interface v%d.%d %d-%02d-%02d on interface %d\n",
data->sensor_major,
data->sensor_minor,
extract_value(data->rx_msg_data, 2),
data->rx_msg_data[4],
data->rx_msg_data[5],
data->interface);
return 0;
}
static int ibmpex_query_sensor_count(struct ibmpex_bmc_data *data)
{
data->tx_msg_data[0] = PEX_GET_SENSOR_COUNT;
data->tx_message.data_len = 1;
ibmpex_send_message(data);
wait_for_completion(&data->read_complete);
if (data->rx_result || data->rx_msg_len != 1)
return -ENOENT;
return data->rx_msg_data[0];
}
static int ibmpex_query_sensor_name(struct ibmpex_bmc_data *data, int sensor)
{
data->tx_msg_data[0] = PEX_GET_SENSOR_NAME;
data->tx_msg_data[1] = sensor;
data->tx_message.data_len = 2;
ibmpex_send_message(data);
wait_for_completion(&data->read_complete);
if (data->rx_result || data->rx_msg_len < 1)
return -ENOENT;
return 0;
}
static int ibmpex_query_sensor_data(struct ibmpex_bmc_data *data, int sensor)
{
data->tx_msg_data[0] = PEX_GET_SENSOR_DATA;
data->tx_msg_data[1] = sensor;
data->tx_message.data_len = 2;
ibmpex_send_message(data);
wait_for_completion(&data->read_complete);
if (data->rx_result || data->rx_msg_len < 26) {
dev_err(data->bmc_device, "Error reading sensor %d.\n",
sensor);
return -ENOENT;
}
return 0;
}
static int ibmpex_reset_high_low_data(struct ibmpex_bmc_data *data)
{
data->tx_msg_data[0] = PEX_RESET_HIGH_LOW;
data->tx_message.data_len = 1;
ibmpex_send_message(data);
wait_for_completion(&data->read_complete);
return 0;
}
static void ibmpex_update_device(struct ibmpex_bmc_data *data)
{
int i, err;
mutex_lock(&data->lock);
if (time_before(jiffies, data->last_updated + REFRESH_INTERVAL) &&
data->valid)
goto out;
for (i = 0; i < data->num_sensors; i++) {
if (!data->sensors[i].in_use)
continue;
err = ibmpex_query_sensor_data(data, i);
if (err)
continue;
data->sensors[i].values[0] =
extract_value(data->rx_msg_data, 16);
data->sensors[i].values[1] =
extract_value(data->rx_msg_data, 18);
data->sensors[i].values[2] =
extract_value(data->rx_msg_data, 20);
}
data->last_updated = jiffies;
data->valid = 1;
out:
mutex_unlock(&data->lock);
}
static struct ibmpex_bmc_data *get_bmc_data(int iface)
{
struct ibmpex_bmc_data *p, *next;
list_for_each_entry_safe(p, next, &driver_data.bmc_data, list)
if (p->interface == iface)
return p;
return NULL;
}
static ssize_t show_name(struct device *dev, struct device_attribute *devattr,
char *buf)
{
return sprintf(buf, "%s\n", DRVNAME);
}
static SENSOR_DEVICE_ATTR(name, S_IRUGO, show_name, NULL, 0);
static ssize_t ibmpex_show_sensor(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
struct ibmpex_bmc_data *data = dev_get_drvdata(dev);
int mult = data->sensors[attr->index].multiplier;
ibmpex_update_device(data);
return sprintf(buf, "%d\n",
data->sensors[attr->index].values[attr->nr] * mult);
}
static ssize_t ibmpex_reset_high_low(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct ibmpex_bmc_data *data = dev_get_drvdata(dev);
ibmpex_reset_high_low_data(data);
return count;
}
static SENSOR_DEVICE_ATTR(reset_high_low, S_IWUSR, NULL,
ibmpex_reset_high_low, 0);
static int is_power_sensor(const char *sensor_id, int len)
{
if (len < PEX_SENSOR_TYPE_LEN)
return 0;
if (!memcmp(sensor_id, power_sensor_sig, PEX_SENSOR_TYPE_LEN))
return 1;
return 0;
}
static int is_temp_sensor(const char *sensor_id, int len)
{
if (len < PEX_SENSOR_TYPE_LEN)
return 0;
if (!memcmp(sensor_id, temp_sensor_sig, PEX_SENSOR_TYPE_LEN))
return 1;
return 0;
}
static int power_sensor_multiplier(struct ibmpex_bmc_data *data,
const char *sensor_id, int len)
{
int i;
if (data->sensor_major == 2)
return 1000000;
for (i = PEX_SENSOR_TYPE_LEN; i < len - 1; i++)
if (!memcmp(&sensor_id[i], watt_sensor_sig, PEX_MULT_LEN))
return 1000000;
return 100000;
}
static int create_sensor(struct ibmpex_bmc_data *data, int type,
int counter, int sensor, int func)
{
int err;
char *n;
n = kmalloc(32, GFP_KERNEL);
if (!n)
return -ENOMEM;
if (type == TEMP_SENSOR)
sprintf(n, "temp%d_input%s",
counter, sensor_name_suffixes[func]);
else if (type == POWER_SENSOR)
sprintf(n, "power%d_average%s",
counter, sensor_name_suffixes[func]);
sysfs_attr_init(&data->sensors[sensor].attr[func].dev_attr.attr);
data->sensors[sensor].attr[func].dev_attr.attr.name = n;
data->sensors[sensor].attr[func].dev_attr.attr.mode = S_IRUGO;
data->sensors[sensor].attr[func].dev_attr.show = ibmpex_show_sensor;
data->sensors[sensor].attr[func].index = sensor;
data->sensors[sensor].attr[func].nr = func;
err = device_create_file(data->bmc_device,
&data->sensors[sensor].attr[func].dev_attr);
if (err) {
data->sensors[sensor].attr[func].dev_attr.attr.name = NULL;
kfree(n);
return err;
}
return 0;
}
static int ibmpex_find_sensors(struct ibmpex_bmc_data *data)
{
int i, j, err;
int sensor_type;
int sensor_counter;
int num_power = 0;
int num_temp = 0;
err = ibmpex_query_sensor_count(data);
if (err <= 0)
return -ENOENT;
data->num_sensors = err;
data->sensors = kcalloc(data->num_sensors, sizeof(*data->sensors),
GFP_KERNEL);
if (!data->sensors)
return -ENOMEM;
for (i = 0; i < data->num_sensors; i++) {
err = ibmpex_query_sensor_name(data, i);
if (err)
continue;
if (is_power_sensor(data->rx_msg_data, data->rx_msg_len)) {
sensor_type = POWER_SENSOR;
num_power++;
sensor_counter = num_power;
data->sensors[i].multiplier =
power_sensor_multiplier(data,
data->rx_msg_data,
data->rx_msg_len);
} else if (is_temp_sensor(data->rx_msg_data,
data->rx_msg_len)) {
sensor_type = TEMP_SENSOR;
num_temp++;
sensor_counter = num_temp;
data->sensors[i].multiplier = 1000;
} else
continue;
data->sensors[i].in_use = 1;
/* Create attributes */
for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) {
err = create_sensor(data, sensor_type, sensor_counter,
i, j);
if (err)
goto exit_remove;
}
}
err = device_create_file(data->bmc_device,
&sensor_dev_attr_reset_high_low.dev_attr);
if (err)
goto exit_remove;
err = device_create_file(data->bmc_device,
&sensor_dev_attr_name.dev_attr);
if (err)
goto exit_remove;
return 0;
exit_remove:
device_remove_file(data->bmc_device,
&sensor_dev_attr_reset_high_low.dev_attr);
device_remove_file(data->bmc_device, &sensor_dev_attr_name.dev_attr);
for (i = 0; i < data->num_sensors; i++)
for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) {
if (!data->sensors[i].attr[j].dev_attr.attr.name)
continue;
device_remove_file(data->bmc_device,
&data->sensors[i].attr[j].dev_attr);
kfree(data->sensors[i].attr[j].dev_attr.attr.name);
}
kfree(data->sensors);
return err;
}
static void ibmpex_register_bmc(int iface, struct device *dev)
{
struct ibmpex_bmc_data *data;
int err;
data = kzalloc(sizeof(*data), GFP_KERNEL);
if (!data)
return;
data->address.addr_type = IPMI_SYSTEM_INTERFACE_ADDR_TYPE;
data->address.channel = IPMI_BMC_CHANNEL;
data->address.data[0] = 0;
data->interface = iface;
data->bmc_device = dev;
/* Create IPMI messaging interface user */
err = ipmi_create_user(data->interface, &driver_data.ipmi_hndlrs,
data, &data->user);
if (err < 0) {
dev_err(dev,
"Unable to register user with IPMI interface %d\n",
data->interface);
goto out;
}
mutex_init(&data->lock);
/* Initialize message */
data->tx_msgid = 0;
init_completion(&data->read_complete);
data->tx_message.netfn = PEX_NET_FUNCTION;
data->tx_message.cmd = PEX_COMMAND;
data->tx_message.data = data->tx_msg_data;
/* Does this BMC support PowerExecutive? */
err = ibmpex_ver_check(data);
if (err)
goto out_user;
/* Register the BMC as a HWMON class device */
data->hwmon_dev = hwmon_device_register(data->bmc_device);
if (IS_ERR(data->hwmon_dev)) {
dev_err(data->bmc_device,
"Unable to register hwmon device for IPMI interface %d\n",
data->interface);
goto out_user;
}
/* finally add the new bmc data to the bmc data list */
dev_set_drvdata(dev, data);
list_add_tail(&data->list, &driver_data.bmc_data);
/* Now go find all the sensors */
err = ibmpex_find_sensors(data);
if (err) {
dev_err(data->bmc_device, "Error %d finding sensors\n", err);
goto out_register;
}
return;
out_register:
hwmon_device_unregister(data->hwmon_dev);
out_user:
ipmi_destroy_user(data->user);
out:
kfree(data);
}
static void ibmpex_bmc_delete(struct ibmpex_bmc_data *data)
{
int i, j;
device_remove_file(data->bmc_device,
&sensor_dev_attr_reset_high_low.dev_attr);
device_remove_file(data->bmc_device, &sensor_dev_attr_name.dev_attr);
for (i = 0; i < data->num_sensors; i++)
for (j = 0; j < PEX_NUM_SENSOR_FUNCS; j++) {
if (!data->sensors[i].attr[j].dev_attr.attr.name)
continue;
device_remove_file(data->bmc_device,
&data->sensors[i].attr[j].dev_attr);
kfree(data->sensors[i].attr[j].dev_attr.attr.name);
}
list_del(&data->list);
dev_set_drvdata(data->bmc_device, NULL);
hwmon_device_unregister(data->hwmon_dev);
ipmi_destroy_user(data->user);
kfree(data->sensors);
kfree(data);
}
static void ibmpex_bmc_gone(int iface)
{
struct ibmpex_bmc_data *data = get_bmc_data(iface);
if (!data)
return;
ibmpex_bmc_delete(data);
}
static void ibmpex_msg_handler(struct ipmi_recv_msg *msg, void *user_msg_data)
{
struct ibmpex_bmc_data *data = (struct ibmpex_bmc_data *)user_msg_data;
if (msg->msgid != data->tx_msgid) {
dev_err(data->bmc_device,
"Mismatch between received msgid (%02x) and transmitted msgid (%02x)!\n",
(int)msg->msgid,
(int)data->tx_msgid);
ipmi_free_recv_msg(msg);
return;
}
data->rx_recv_type = msg->recv_type;
if (msg->msg.data_len > 0)
data->rx_result = msg->msg.data[0];
else
data->rx_result = IPMI_UNKNOWN_ERR_COMPLETION_CODE;
if (msg->msg.data_len > 1) {
data->rx_msg_len = msg->msg.data_len - 1;
memcpy(data->rx_msg_data, msg->msg.data + 1, data->rx_msg_len);
} else
data->rx_msg_len = 0;
ipmi_free_recv_msg(msg);
complete(&data->read_complete);
}
static int __init ibmpex_init(void)
{
return ipmi_smi_watcher_register(&driver_data.bmc_events);
}
static void __exit ibmpex_exit(void)
{
struct ibmpex_bmc_data *p, *next;
ipmi_smi_watcher_unregister(&driver_data.bmc_events);
list_for_each_entry_safe(p, next, &driver_data.bmc_data, list)
ibmpex_bmc_delete(p);
}
MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
MODULE_DESCRIPTION("IBM PowerExecutive power/temperature sensor driver");
MODULE_LICENSE("GPL");
module_init(ibmpex_init);
module_exit(ibmpex_exit);
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3350-*");
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3550-*");
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3650-*");
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3655-*");
MODULE_ALIAS("dmi:bvnIBM:*:pnIBMSystemx3755-*");