diff options
Diffstat (limited to 'drivers/hwmon/lm83.c')
| -rw-r--r-- | drivers/hwmon/lm83.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/hwmon/lm83.c b/drivers/hwmon/lm83.c index 26dfa9e216c..aac4ec2bf69 100644 --- a/drivers/hwmon/lm83.c +++ b/drivers/hwmon/lm83.c @@ -35,6 +35,7 @@ #include <linux/hwmon-sysfs.h> #include <linux/hwmon.h> #include <linux/err.h> +#include <linux/mutex.h> /* * Addresses to scan @@ -139,7 +140,7 @@ static struct i2c_driver lm83_driver = { struct lm83_data { struct i2c_client client; struct class_device *class_dev; - struct semaphore update_lock; + struct mutex update_lock; char valid; /* zero until following fields are valid */ unsigned long last_updated; /* in jiffies */ @@ -171,11 +172,11 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *devattr, long val = simple_strtol(buf, NULL, 10); int nr = attr->index; - down(&data->update_lock); + mutex_lock(&data->update_lock); data->temp[nr] = TEMP_TO_REG(val); i2c_smbus_write_byte_data(client, LM83_REG_W_HIGH[nr - 4], data->temp[nr]); - up(&data->update_lock); + mutex_unlock(&data->update_lock); return count; } @@ -300,7 +301,7 @@ static int lm83_detect(struct i2c_adapter *adapter, int address, int kind) /* We can fill in the remaining client fields */ 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))) @@ -373,7 +374,7 @@ static struct lm83_data *lm83_update_device(struct device *dev) struct i2c_client *client = to_i2c_client(dev); struct lm83_data *data = i2c_get_clientdata(client); - down(&data->update_lock); + mutex_lock(&data->update_lock); if (time_after(jiffies, data->last_updated + HZ * 2) || !data->valid) { int nr; @@ -393,7 +394,7 @@ static struct lm83_data *lm83_update_device(struct device *dev) data->valid = 1; } - up(&data->update_lock); + mutex_unlock(&data->update_lock); return data; } |