[PATCH] w1: Use mutexes instead of semaphores.

Use mutexes instead of semaphores.
Patch tested on x86_64 and i386 with test bus master driver.

Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 17 insertions, 17 deletions

diff --git a/drivers/w1/masters/ds2482.c b/drivers/w1/masters/ds2482.c
index d1cacd23576..af492cc48db 100644
--- a/drivers/w1/masters/ds2482.c
+++ b/drivers/w1/masters/ds2482.c
@@ -125,7 +125,7 @@ struct ds2482_w1_chan {
 
 struct ds2482_data {
         struct i2c_client       client;
-        struct semaphore        access_lock;
+        struct mutex            access_lock;
 
         /* 1-wire interface(s) */
         int                     w1_count;       /* 1 or 8 */
@@ -265,7 +265,7 @@ static u8 ds2482_w1_touch_bit(void *data, u8 bit)
         struct ds2482_data    *pdev = pchan->pdev;
         int status = -1;
 
-        down(&pdev->access_lock);
+        mutex_lock(&pdev->access_lock);
 
         /* Select the channel */
         ds2482_wait_1wire_idle(pdev);
@@ -277,7 +277,7 @@ static u8 ds2482_w1_touch_bit(void *data, u8 bit)
                                   bit ? 0xFF : 0))
                 status = ds2482_wait_1wire_idle(pdev);
 
-        up(&pdev->access_lock);
+        mutex_unlock(&pdev->access_lock);
 
         return (status & DS2482_REG_STS_SBR) ? 1 : 0;
 }
@@ -297,7 +297,7 @@ static u8 ds2482_w1_triplet(void *data, u8 dbit)
         struct ds2482_data    *pdev = pchan->pdev;
         int status = (3 << 5);
 
-        down(&pdev->access_lock);
+        mutex_lock(&pdev->access_lock);
 
         /* Select the channel */
         ds2482_wait_1wire_idle(pdev);
@@ -309,7 +309,7 @@ static u8 ds2482_w1_triplet(void *data, u8 dbit)
                                   dbit ? 0xFF : 0))
                 status = ds2482_wait_1wire_idle(pdev);
 
-        up(&pdev->access_lock);
+        mutex_unlock(&pdev->access_lock);
 
         /* Decode the status */
         return (status >> 5);
@@ -326,7 +326,7 @@ static void ds2482_w1_write_byte(void *data, u8 byte)
         struct ds2482_w1_chan *pchan = data;
         struct ds2482_data    *pdev = pchan->pdev;
 
-        down(&pdev->access_lock);
+        mutex_lock(&pdev->access_lock);
 
         /* Select the channel */
         ds2482_wait_1wire_idle(pdev);
@@ -336,7 +336,7 @@ static void ds2482_w1_write_byte(void *data, u8 byte)
         /* Send the write byte command */
         ds2482_send_cmd_data(pdev, DS2482_CMD_1WIRE_WRITE_BYTE, byte);
 
-        up(&pdev->access_lock);
+        mutex_unlock(&pdev->access_lock);
 }
 
 /**
@@ -351,7 +351,7 @@ static u8 ds2482_w1_read_byte(void *data)
         struct ds2482_data    *pdev = pchan->pdev;
         int result;
 
-        down(&pdev->access_lock);
+        mutex_lock(&pdev->access_lock);
 
         /* Select the channel */
         ds2482_wait_1wire_idle(pdev);
@@ -370,7 +370,7 @@ static u8 ds2482_w1_read_byte(void *data)
         /* Read the data byte */
         result = i2c_smbus_read_byte(&pdev->client);
 
-        up(&pdev->access_lock);
+        mutex_unlock(&pdev->access_lock);
 
         return result;
 }
@@ -389,7 +389,7 @@ static u8 ds2482_w1_reset_bus(void *data)
         int err;
         u8 retval = 1;
 
-        down(&pdev->access_lock);
+        mutex_lock(&pdev->access_lock);
 
         /* Select the channel */
         ds2482_wait_1wire_idle(pdev);
@@ -409,7 +409,7 @@ static u8 ds2482_w1_reset_bus(void *data)
                                              0xF0);
         }
 
-        up(&pdev->access_lock);
+        mutex_unlock(&pdev->access_lock);
 
         return retval;
 }
@@ -482,7 +482,7 @@ static int ds2482_detect(struct i2c_adapter *adapter, int address, int kind)
         snprintf(new_client->name, sizeof(new_client->name), "ds2482-%d00",
                  data->w1_count);
 
-        init_MUTEX(&data->access_lock);
+        mutex_init(&data->access_lock);
 
         /* Tell the I2C layer a new client has arrived */
         if ((err = i2c_attach_client(new_client)))
diff --git a/drivers/w1/masters/ds2490.c b/drivers/w1/masters/ds2490.c
index 637677833da..299e274d241 100644
--- a/drivers/w1/masters/ds2490.c
+++ b/drivers/w1/masters/ds2490.c
@@ -169,7 +169,7 @@ static int ds_send_control(struct ds_device *, u16, u16);
 static int ds_send_control_cmd(struct ds_device *, u16, u16);
 
 static LIST_HEAD(ds_devices);
-static DECLARE_MUTEX(ds_mutex);
+static DEFINE_MUTEX(ds_mutex);
 
 static struct usb_driver ds_driver = {
         .name =         "DS9490R",
@@ -887,9 +887,9 @@ static int ds_probe(struct usb_interface *intf,
         if (err)
                 goto err_out_clear;
 
-        down(&ds_mutex);
+        mutex_lock(&ds_mutex);
         list_add_tail(&dev->ds_entry, &ds_devices);
-        up(&ds_mutex);
+        mutex_unlock(&ds_mutex);
 
         return 0;
 
@@ -909,9 +909,9 @@ static void ds_disconnect(struct usb_interface *intf)
         if (!dev)
                 return;
 
-        down(&ds_mutex);
+        mutex_lock(&ds_mutex);
         list_del(&dev->ds_entry);
-        up(&ds_mutex);
+        mutex_unlock(&ds_mutex);
 
         ds_w1_fini(dev);