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Diffstat (limited to 'drivers/hwmon/lm75.c')
-rw-r--r--drivers/hwmon/lm75.c13
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 74ca2c8c61c3..fc25b90ec24a 100644
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -25,6 +25,7 @@
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/err.h>
+#include <linux/mutex.h>
#include "lm75.h"
@@ -47,7 +48,7 @@ I2C_CLIENT_INSMOD_1(lm75);
struct lm75_data {
struct i2c_client client;
struct class_device *class_dev;
- struct semaphore update_lock;
+ struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u16 temp_input; /* Register values */
@@ -91,10 +92,10 @@ static ssize_t set_##value(struct device *dev, struct device_attribute *attr, co
struct lm75_data *data = i2c_get_clientdata(client); \
int temp = simple_strtoul(buf, NULL, 10); \
\
- down(&data->update_lock); \
+ mutex_lock(&data->update_lock); \
data->value = LM75_TEMP_TO_REG(temp); \
lm75_write_value(client, reg, data->value); \
- up(&data->update_lock); \
+ mutex_unlock(&data->update_lock); \
return count; \
}
set(temp_max, LM75_REG_TEMP_OS);
@@ -188,7 +189,7 @@ static int lm75_detect(struct i2c_adapter *adapter, int address, int kind)
/* Fill in the remaining client fields and put it into the global list */
strlcpy(new_client->name, name, I2C_NAME_SIZE);
data->valid = 0;
- init_MUTEX(&data->update_lock);
+ mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
@@ -264,7 +265,7 @@ static struct lm75_data *lm75_update_device(struct device *dev)
struct i2c_client *client = to_i2c_client(dev);
struct lm75_data *data = i2c_get_clientdata(client);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
@@ -277,7 +278,7 @@ static struct lm75_data *lm75_update_device(struct device *dev)
data->valid = 1;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return data;
}