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| author | Thomas Gleixner <tglx@linutronix.de> | 2010-10-28 20:31:44 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2010-10-28 20:31:44 +0200 |
| commit | 9c627e3be3e8f36eda73ed9e8aa4763582841c1f (patch) | |
| tree | e04a1c7d96ea649e2f7831d388fa6b643411f0a3 | |
| parent | caaa0f36c378c6fec6fd5260a63566e002ac4a84 (diff) | |
| download | blackbird-op-linux-9c627e3be3e8f36eda73ed9e8aa4763582841c1f.tar.gz blackbird-op-linux-9c627e3be3e8f36eda73ed9e8aa4763582841c1f.zip | |
hwmon: (s3c-hwmon) Use a real mutex
The semaphore which protects the ADC is semantically a mutex. Use a
real mutex.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
| -rw-r--r-- | drivers/hwmon/s3c-hwmon.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/hwmon/s3c-hwmon.c b/drivers/hwmon/s3c-hwmon.c index 3f3f9a47acfd..05248f2d7581 100644 --- a/drivers/hwmon/s3c-hwmon.c +++ b/drivers/hwmon/s3c-hwmon.c @@ -51,7 +51,7 @@ struct s3c_hwmon_attr { * @attr: The holders for the channel attributes. */ struct s3c_hwmon { - struct semaphore lock; + struct mutex lock; struct s3c_adc_client *client; struct device *hwmon_dev; @@ -73,14 +73,14 @@ static int s3c_hwmon_read_ch(struct device *dev, { int ret; - ret = down_interruptible(&hwmon->lock); + ret = mutex_lock_interruptible(&hwmon->lock); if (ret < 0) return ret; dev_dbg(dev, "reading channel %d\n", channel); ret = s3c_adc_read(hwmon->client, channel); - up(&hwmon->lock); + mutex_unlock(&hwmon->lock); return ret; } @@ -296,7 +296,7 @@ static int __devinit s3c_hwmon_probe(struct platform_device *dev) platform_set_drvdata(dev, hwmon); - init_MUTEX(&hwmon->lock); + mutex_init(&hwmon->lock); /* Register with the core ADC driver. */ |
