[PATCH] I2C: Convert i2c to mutexes
The patch below converts a few i2c semaphores to mutexes
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/i2c/chips/ds1374.c b/drivers/i2c/chips/ds1374.c
index 0710b9d..03d09ed 100644
--- a/drivers/i2c/chips/ds1374.c
+++ b/drivers/i2c/chips/ds1374.c
@@ -26,6 +26,7 @@
#include <linux/i2c.h>
#include <linux/rtc.h>
#include <linux/bcd.h>
+#include <linux/mutex.h>
#define DS1374_REG_TOD0 0x00
#define DS1374_REG_TOD1 0x01
@@ -41,7 +42,7 @@
#define DS1374_DRV_NAME "ds1374"
-static DECLARE_MUTEX(ds1374_mutex);
+static DEFINE_MUTEX(ds1374_mutex);
static struct i2c_driver ds1374_driver;
static struct i2c_client *save_client;
@@ -114,7 +115,7 @@
ulong t1, t2;
int limit = 10; /* arbitrary retry limit */
- down(&ds1374_mutex);
+ mutex_lock(&ds1374_mutex);
/*
* Since the reads are being performed one byte at a time using
@@ -127,7 +128,7 @@
t2 = ds1374_read_rtc();
} while (t1 != t2 && limit--);
- up(&ds1374_mutex);
+ mutex_unlock(&ds1374_mutex);
if (t1 != t2) {
dev_warn(&save_client->dev,
@@ -145,7 +146,7 @@
t1 = *(ulong *) arg;
- down(&ds1374_mutex);
+ mutex_lock(&ds1374_mutex);
/*
* Since the writes are being performed one byte at a time using
@@ -158,7 +159,7 @@
t2 = ds1374_read_rtc();
} while (t1 != t2 && limit--);
- up(&ds1374_mutex);
+ mutex_unlock(&ds1374_mutex);
if (t1 != t2)
dev_warn(&save_client->dev,
diff --git a/drivers/i2c/chips/m41t00.c b/drivers/i2c/chips/m41t00.c
index 2dc3d48..b5aabe7 100644
--- a/drivers/i2c/chips/m41t00.c
+++ b/drivers/i2c/chips/m41t00.c
@@ -24,13 +24,14 @@
#include <linux/i2c.h>
#include <linux/rtc.h>
#include <linux/bcd.h>
+#include <linux/mutex.h>
#include <asm/time.h>
#include <asm/rtc.h>
#define M41T00_DRV_NAME "m41t00"
-static DECLARE_MUTEX(m41t00_mutex);
+static DEFINE_MUTEX(m41t00_mutex);
static struct i2c_driver m41t00_driver;
static struct i2c_client *save_client;
@@ -54,7 +55,7 @@
sec = min = hour = day = mon = year = 0;
sec1 = min1 = hour1 = day1 = mon1 = year1 = 0;
- down(&m41t00_mutex);
+ mutex_lock(&m41t00_mutex);
do {
if (((sec = i2c_smbus_read_byte_data(save_client, 0)) >= 0)
&& ((min = i2c_smbus_read_byte_data(save_client, 1))
@@ -80,7 +81,7 @@
mon1 = mon;
year1 = year;
} while (--limit > 0);
- up(&m41t00_mutex);
+ mutex_unlock(&m41t00_mutex);
if (limit == 0) {
dev_warn(&save_client->dev,
@@ -125,7 +126,7 @@
BIN_TO_BCD(tm.tm_mday);
BIN_TO_BCD(tm.tm_year);
- down(&m41t00_mutex);
+ mutex_lock(&m41t00_mutex);
if ((i2c_smbus_write_byte_data(save_client, 0, tm.tm_sec & 0x7f) < 0)
|| (i2c_smbus_write_byte_data(save_client, 1, tm.tm_min & 0x7f)
< 0)
@@ -140,7 +141,7 @@
dev_warn(&save_client->dev,"m41t00: can't write to rtc chip\n");
- up(&m41t00_mutex);
+ mutex_unlock(&m41t00_mutex);
return;
}