diff options
Diffstat (limited to 'drivers/hwmon/hdaps.c')
| -rw-r--r-- | drivers/hwmon/hdaps.c | 37 |
1 files changed, 18 insertions, 19 deletions
diff --git a/drivers/hwmon/hdaps.c b/drivers/hwmon/hdaps.c index 7636c1a58f9c..23a9e1ea8e32 100644 --- a/drivers/hwmon/hdaps.c +++ b/drivers/hwmon/hdaps.c @@ -33,7 +33,6 @@ #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 */ @@ -71,10 +70,10 @@ static u8 km_activity; static int rest_x; static int rest_y; -static DEFINE_MUTEX(hdaps_mutex); +static DECLARE_MUTEX(hdaps_sem); /* - * __get_latch - Get the value from a given port. Callers must hold hdaps_mutex. + * __get_latch - Get the value from a given port. Callers must hold hdaps_sem. */ static inline u8 __get_latch(u16 port) { @@ -83,7 +82,7 @@ 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_mutex. + * port contains the given value. Callers must hold hdaps_sem. */ static inline int __check_latch(u16 port, u8 val) { @@ -94,7 +93,7 @@ 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_mutex. + * returning zero if the value is obtained. Callers must hold hdaps_sem. */ static int __wait_latch(u16 port, u8 val) { @@ -111,7 +110,7 @@ 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_mutex. + * for refresh to complete. Callers must hold hdaps_sem. */ static void __device_refresh(void) { @@ -125,7 +124,7 @@ 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_mutex. + * successful and nonzero on error. Callers must hold hdaps_sem. */ static int __device_refresh_sync(void) { @@ -135,7 +134,7 @@ 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_mutex. + * data, and then initiate an async refresh. Callers must hold hdaps_sem. */ static inline void __device_complete(void) { @@ -153,7 +152,7 @@ static int hdaps_readb_one(unsigned int port, u8 *val) { int ret; - mutex_lock(&hdaps_mutex); + down(&hdaps_sem); /* do a sync refresh -- we need to be sure that we read fresh data */ ret = __device_refresh_sync(); @@ -164,7 +163,7 @@ static int hdaps_readb_one(unsigned int port, u8 *val) __device_complete(); out: - mutex_unlock(&hdaps_mutex); + up(&hdaps_sem); return ret; } @@ -199,9 +198,9 @@ static int hdaps_read_pair(unsigned int port1, unsigned int port2, { int ret; - mutex_lock(&hdaps_mutex); + down(&hdaps_sem); ret = __hdaps_read_pair(port1, port2, val1, val2); - mutex_unlock(&hdaps_mutex); + up(&hdaps_sem); return ret; } @@ -214,7 +213,7 @@ static int hdaps_device_init(void) { int total, ret = -ENXIO; - mutex_lock(&hdaps_mutex); + down(&hdaps_sem); outb(0x13, 0x1610); outb(0x01, 0x161f); @@ -280,7 +279,7 @@ static int hdaps_device_init(void) } out: - mutex_unlock(&hdaps_mutex); + up(&hdaps_sem); return ret; } @@ -314,7 +313,7 @@ static struct platform_driver hdaps_driver = { }; /* - * hdaps_calibrate - Set our "resting" values. Callers must hold hdaps_mutex. + * hdaps_calibrate - Set our "resting" values. Callers must hold hdaps_sem. */ static void hdaps_calibrate(void) { @@ -326,7 +325,7 @@ static void hdaps_mousedev_poll(unsigned long unused) int x, y; /* Cannot sleep. Try nonblockingly. If we fail, try again later. */ - if (!mutex_trylock(&hdaps_mutex)) { + if (down_trylock(&hdaps_sem)) { mod_timer(&hdaps_timer,jiffies + HDAPS_POLL_PERIOD); return; } @@ -341,7 +340,7 @@ static void hdaps_mousedev_poll(unsigned long unused) mod_timer(&hdaps_timer, jiffies + HDAPS_POLL_PERIOD); out: - mutex_unlock(&hdaps_mutex); + up(&hdaps_sem); } @@ -421,9 +420,9 @@ static ssize_t hdaps_calibrate_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - mutex_lock(&hdaps_mutex); + down(&hdaps_sem); hdaps_calibrate(); - mutex_unlock(&hdaps_mutex); + up(&hdaps_sem); return count; } |