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path: root/drivers/hwmon/lm77.c
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Diffstat (limited to 'drivers/hwmon/lm77.c')
-rw-r--r--drivers/hwmon/lm77.c21
1 files changed, 11 insertions, 10 deletions
diff --git a/drivers/hwmon/lm77.c b/drivers/hwmon/lm77.c
index df9e02aaa70a..459cc977380a 100644
--- a/drivers/hwmon/lm77.c
+++ b/drivers/hwmon/lm77.c
@@ -32,6 +32,7 @@
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/err.h>
+#include <linux/mutex.h>
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, I2C_CLIENT_END };
@@ -51,7 +52,7 @@ I2C_CLIENT_INSMOD_1(lm77);
struct lm77_data {
struct i2c_client client;
struct class_device *class_dev;
- struct semaphore update_lock;
+ struct mutex update_lock;
char valid;
unsigned long last_updated; /* In jiffies */
int temp_input; /* Temperatures */
@@ -139,10 +140,10 @@ static ssize_t set_##value(struct device *dev, struct device_attribute *attr, co
struct lm77_data *data = i2c_get_clientdata(client); \
long val = simple_strtoul(buf, NULL, 10); \
\
- down(&data->update_lock); \
+ mutex_lock(&data->update_lock); \
data->value = val; \
lm77_write_value(client, reg, LM77_TEMP_TO_REG(data->value)); \
- up(&data->update_lock); \
+ mutex_unlock(&data->update_lock); \
return count; \
}
@@ -157,11 +158,11 @@ static ssize_t set_temp_crit_hyst(struct device *dev, struct device_attribute *a
struct lm77_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
data->temp_hyst = data->temp_crit - val;
lm77_write_value(client, LM77_REG_TEMP_HYST,
LM77_TEMP_TO_REG(data->temp_hyst));
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -173,7 +174,7 @@ static ssize_t set_temp_crit(struct device *dev, struct device_attribute *attr,
long val = simple_strtoul(buf, NULL, 10);
int oldcrithyst;
- down(&data->update_lock);
+ mutex_lock(&data->update_lock);
oldcrithyst = data->temp_crit - data->temp_hyst;
data->temp_crit = val;
data->temp_hyst = data->temp_crit - oldcrithyst;
@@ -181,7 +182,7 @@ static ssize_t set_temp_crit(struct device *dev, struct device_attribute *attr,
LM77_TEMP_TO_REG(data->temp_crit));
lm77_write_value(client, LM77_REG_TEMP_HYST,
LM77_TEMP_TO_REG(data->temp_hyst));
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return count;
}
@@ -306,7 +307,7 @@ static int lm77_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)))
@@ -380,7 +381,7 @@ static struct lm77_data *lm77_update_device(struct device *dev)
struct i2c_client *client = to_i2c_client(dev);
struct lm77_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) {
@@ -406,7 +407,7 @@ static struct lm77_data *lm77_update_device(struct device *dev)
data->valid = 1;
}
- up(&data->update_lock);
+ mutex_unlock(&data->update_lock);
return data;
}