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path: root/drivers/hwmon/hdaps.c
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Diffstat (limited to 'drivers/hwmon/hdaps.c')
-rw-r--r--drivers/hwmon/hdaps.c37
1 files changed, 19 insertions, 18 deletions
diff --git a/drivers/hwmon/hdaps.c b/drivers/hwmon/hdaps.c
index 23a9e1ea8e3..7636c1a58f9 100644
--- a/drivers/hwmon/hdaps.c
+++ b/drivers/hwmon/hdaps.c
@@ -33,6 +33,7 @@
#include <linux/module.h>
#include <linux/timer.h>
#include <linux/dmi.h>
+#include <linux/mutex.h>
#include <asm/io.h>
#define HDAPS_LOW_PORT 0x1600 /* first port used by hdaps */
@@ -70,10 +71,10 @@ static u8 km_activity;
static int rest_x;
static int rest_y;
-static DECLARE_MUTEX(hdaps_sem);
+static DEFINE_MUTEX(hdaps_mutex);
/*
- * __get_latch - Get the value from a given port. Callers must hold hdaps_sem.
+ * __get_latch - Get the value from a given port. Callers must hold hdaps_mutex.
*/
static inline u8 __get_latch(u16 port)
{
@@ -82,7 +83,7 @@ static inline u8 __get_latch(u16 port)
/*
* __check_latch - Check a port latch for a given value. Returns zero if the
- * port contains the given value. Callers must hold hdaps_sem.
+ * port contains the given value. Callers must hold hdaps_mutex.
*/
static inline int __check_latch(u16 port, u8 val)
{
@@ -93,7 +94,7 @@ static inline int __check_latch(u16 port, u8 val)
/*
* __wait_latch - Wait up to 100us for a port latch to get a certain value,
- * returning zero if the value is obtained. Callers must hold hdaps_sem.
+ * returning zero if the value is obtained. Callers must hold hdaps_mutex.
*/
static int __wait_latch(u16 port, u8 val)
{
@@ -110,7 +111,7 @@ static int __wait_latch(u16 port, u8 val)
/*
* __device_refresh - request a refresh from the accelerometer. Does not wait
- * for refresh to complete. Callers must hold hdaps_sem.
+ * for refresh to complete. Callers must hold hdaps_mutex.
*/
static void __device_refresh(void)
{
@@ -124,7 +125,7 @@ static void __device_refresh(void)
/*
* __device_refresh_sync - request a synchronous refresh from the
* accelerometer. We wait for the refresh to complete. Returns zero if
- * successful and nonzero on error. Callers must hold hdaps_sem.
+ * successful and nonzero on error. Callers must hold hdaps_mutex.
*/
static int __device_refresh_sync(void)
{
@@ -134,7 +135,7 @@ static int __device_refresh_sync(void)
/*
* __device_complete - indicate to the accelerometer that we are done reading
- * data, and then initiate an async refresh. Callers must hold hdaps_sem.
+ * data, and then initiate an async refresh. Callers must hold hdaps_mutex.
*/
static inline void __device_complete(void)
{
@@ -152,7 +153,7 @@ static int hdaps_readb_one(unsigned int port, u8 *val)
{
int ret;
- down(&hdaps_sem);
+ mutex_lock(&hdaps_mutex);
/* do a sync refresh -- we need to be sure that we read fresh data */
ret = __device_refresh_sync();
@@ -163,7 +164,7 @@ static int hdaps_readb_one(unsigned int port, u8 *val)
__device_complete();
out:
- up(&hdaps_sem);
+ mutex_unlock(&hdaps_mutex);
return ret;
}
@@ -198,9 +199,9 @@ static int hdaps_read_pair(unsigned int port1, unsigned int port2,
{
int ret;
- down(&hdaps_sem);
+ mutex_lock(&hdaps_mutex);
ret = __hdaps_read_pair(port1, port2, val1, val2);
- up(&hdaps_sem);
+ mutex_unlock(&hdaps_mutex);
return ret;
}
@@ -213,7 +214,7 @@ static int hdaps_device_init(void)
{
int total, ret = -ENXIO;
- down(&hdaps_sem);
+ mutex_lock(&hdaps_mutex);
outb(0x13, 0x1610);
outb(0x01, 0x161f);
@@ -279,7 +280,7 @@ static int hdaps_device_init(void)
}
out:
- up(&hdaps_sem);
+ mutex_unlock(&hdaps_mutex);
return ret;
}
@@ -313,7 +314,7 @@ static struct platform_driver hdaps_driver = {
};
/*
- * hdaps_calibrate - Set our "resting" values. Callers must hold hdaps_sem.
+ * hdaps_calibrate - Set our "resting" values. Callers must hold hdaps_mutex.
*/
static void hdaps_calibrate(void)
{
@@ -325,7 +326,7 @@ static void hdaps_mousedev_poll(unsigned long unused)
int x, y;
/* Cannot sleep. Try nonblockingly. If we fail, try again later. */
- if (down_trylock(&hdaps_sem)) {
+ if (!mutex_trylock(&hdaps_mutex)) {
mod_timer(&hdaps_timer,jiffies + HDAPS_POLL_PERIOD);
return;
}
@@ -340,7 +341,7 @@ static void hdaps_mousedev_poll(unsigned long unused)
mod_timer(&hdaps_timer, jiffies + HDAPS_POLL_PERIOD);
out:
- up(&hdaps_sem);
+ mutex_unlock(&hdaps_mutex);
}
@@ -420,9 +421,9 @@ static ssize_t hdaps_calibrate_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
- down(&hdaps_sem);
+ mutex_lock(&hdaps_mutex);
hdaps_calibrate();
- up(&hdaps_sem);
+ mutex_unlock(&hdaps_mutex);
return count;
}