diff options
Diffstat (limited to 'drivers/i2c/busses/i2c-amd756-s4882.c')
| -rw-r--r-- | drivers/i2c/busses/i2c-amd756-s4882.c | 13 |
1 files changed, 6 insertions, 7 deletions
diff --git a/drivers/i2c/busses/i2c-amd756-s4882.c b/drivers/i2c/busses/i2c-amd756-s4882.c index 56c7d987590f..08e915730caf 100644 --- a/drivers/i2c/busses/i2c-amd756-s4882.c +++ b/drivers/i2c/busses/i2c-amd756-s4882.c @@ -38,6 +38,7 @@ #include <linux/slab.h> #include <linux/init.h> #include <linux/i2c.h> +#include <linux/mutex.h> extern struct i2c_adapter amd756_smbus; @@ -45,7 +46,7 @@ static struct i2c_adapter *s4882_adapter; static struct i2c_algorithm *s4882_algo; /* Wrapper access functions for multiplexed SMBus */ -static struct semaphore amd756_lock; +static DEFINE_MUTEX(amd756_lock); static s32 amd756_access_virt0(struct i2c_adapter * adap, u16 addr, unsigned short flags, char read_write, @@ -59,12 +60,12 @@ static s32 amd756_access_virt0(struct i2c_adapter * adap, u16 addr, || addr == 0x18) return -1; - down(&amd756_lock); + mutex_lock(&amd756_lock); error = amd756_smbus.algo->smbus_xfer(adap, addr, flags, read_write, command, size, data); - up(&amd756_lock); + mutex_unlock(&amd756_lock); return error; } @@ -87,7 +88,7 @@ static inline s32 amd756_access_channel(struct i2c_adapter * adap, u16 addr, if (addr != 0x4c && (addr & 0xfc) != 0x50 && (addr & 0xfc) != 0x30) return -1; - down(&amd756_lock); + mutex_lock(&amd756_lock); if (last_channels != channels) { union i2c_smbus_data mplxdata; @@ -105,7 +106,7 @@ static inline s32 amd756_access_channel(struct i2c_adapter * adap, u16 addr, command, size, data); UNLOCK: - up(&amd756_lock); + mutex_unlock(&amd756_lock); return error; } @@ -166,8 +167,6 @@ static int __init amd756_s4882_init(void) } printk(KERN_INFO "Enabling SMBus multiplexing for Tyan S4882\n"); - init_MUTEX(&amd756_lock); - /* Define the 5 virtual adapters and algorithms structures */ if (!(s4882_adapter = kzalloc(5 * sizeof(struct i2c_adapter), GFP_KERNEL))) { |