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hwmon: (lm70) Convert semaphore to mutex

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Signed-off-by: Matthias Kaehlcke <matthias.kaehlcke@gmail.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
This commit is contained in:
Matthias Kaehlcke 2007-10-24 14:59:09 +02:00 committed by Mark M. Hoffman
parent 8de577095d
commit 4bfe66048e
1 changed files with 6 additions and 5 deletions
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11
drivers/hwmon/lm70.c
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@ -31,14 +31,15 @@
#include <linux/err.h> #include <linux/err.h>
#include <linux/sysfs.h> #include <linux/sysfs.h>
#include <linux/hwmon.h> #include <linux/hwmon.h>
#include <linux/mutex.h>
#include <linux/spi/spi.h> #include <linux/spi/spi.h>
#include <asm/semaphore.h>
#define DRVNAME "lm70" #define DRVNAME "lm70"
struct lm70 { struct lm70 {
struct device *hwmon_dev; struct device *hwmon_dev;
struct semaphore sem; struct mutex lock;
}; };
/* sysfs hook function */ /* sysfs hook function */
@ -51,7 +52,7 @@ static ssize_t lm70_sense_temp(struct device *dev,
s16 raw=0; s16 raw=0;
struct lm70 *p_lm70 = dev_get_drvdata(&spi->dev); struct lm70 *p_lm70 = dev_get_drvdata(&spi->dev);
if (down_interruptible(&p_lm70->sem)) if (mutex_lock_interruptible(&p_lm70->lock))
return -ERESTARTSYS; return -ERESTARTSYS;
/* /*
@ -83,7 +84,7 @@ static ssize_t lm70_sense_temp(struct device *dev,
val = ((int)raw/32) * 250; val = ((int)raw/32) * 250;
status = sprintf(buf, "%d\n", val); /* millidegrees Celsius */ status = sprintf(buf, "%d\n", val); /* millidegrees Celsius */
out: out:
up(&p_lm70->sem); mutex_unlock(&p_lm70->lock);
return status; return status;
} }
@ -112,7 +113,7 @@ static int __devinit lm70_probe(struct spi_device *spi)
if (!p_lm70) if (!p_lm70)
return -ENOMEM; return -ENOMEM;
init_MUTEX(&p_lm70->sem); mutex_init(&p_lm70->lock);
/* sysfs hook */ /* sysfs hook */
p_lm70->hwmon_dev = hwmon_device_register(&spi->dev); p_lm70->hwmon_dev = hwmon_device_register(&spi->dev);