[PATCH] hwmon: Semaphore to mutex conversions

[safe/jmp/linux-2.6] / drivers / hwmon / hdaps.c

diff --git a/drivers/hwmon/hdaps.c b/drivers/hwmon/hdaps.c
index 23a9e1e..7636c1a 100644 (file)
--- 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;
 }