[POWERPC] Update documentation for flat device tree format v17

[powerpc.git] / drivers / hwmon / f71805f.c

diff --git a/drivers/hwmon/f71805f.c b/drivers/hwmon/f71805f.c
index a272cae..7c29734 100644 (file)
--- a/drivers/hwmon/f71805f.c
+++ b/drivers/hwmon/f71805f.c
@@ -146,7 +146,6 @@ superio_exit(int base)
 struct f71805f_data {
        unsigned short addr;
        const char *name;
-       struct mutex lock;
        struct class_device *class_dev;
 
        struct mutex update_lock;
@@ -271,50 +270,42 @@ static inline u8 temp_to_reg(long val)
  * Device I/O access
  */
 
+/* Must be called with data->update_lock held, except during initialization */
 static u8 f71805f_read8(struct f71805f_data *data, u8 reg)
 {
-       u8 val;
-
-       mutex_lock(&data->lock);
        outb(reg, data->addr + ADDR_REG_OFFSET);
-       val = inb(data->addr + DATA_REG_OFFSET);
-       mutex_unlock(&data->lock);
-
-       return val;
+       return inb(data->addr + DATA_REG_OFFSET);
 }
 
+/* Must be called with data->update_lock held, except during initialization */
 static void f71805f_write8(struct f71805f_data *data, u8 reg, u8 val)
 {
-       mutex_lock(&data->lock);
        outb(reg, data->addr + ADDR_REG_OFFSET);
        outb(val, data->addr + DATA_REG_OFFSET);
-       mutex_unlock(&data->lock);
 }
 
 /* It is important to read the MSB first, because doing so latches the
-   value of the LSB, so we are sure both bytes belong to the same value. */
+   value of the LSB, so we are sure both bytes belong to the same value.
+   Must be called with data->update_lock held, except during initialization */
 static u16 f71805f_read16(struct f71805f_data *data, u8 reg)
 {
        u16 val;
 
-       mutex_lock(&data->lock);
        outb(reg, data->addr + ADDR_REG_OFFSET);
        val = inb(data->addr + DATA_REG_OFFSET) << 8;
        outb(++reg, data->addr + ADDR_REG_OFFSET);
        val |= inb(data->addr + DATA_REG_OFFSET);
-       mutex_unlock(&data->lock);
 
        return val;
 }
 
+/* Must be called with data->update_lock held, except during initialization */
 static void f71805f_write16(struct f71805f_data *data, u8 reg, u16 val)
 {
-       mutex_lock(&data->lock);
        outb(reg, data->addr + ADDR_REG_OFFSET);
        outb(val >> 8, data->addr + DATA_REG_OFFSET);
        outb(++reg, data->addr + ADDR_REG_OFFSET);
        outb(val & 0xff, data->addr + DATA_REG_OFFSET);
-       mutex_unlock(&data->lock);
 }
 
 static struct f71805f_data *f71805f_update_device(struct device *dev)
@@ -1150,7 +1141,6 @@ static int __devinit f71805f_probe(struct platform_device *pdev)
 
        res = platform_get_resource(pdev, IORESOURCE_IO, 0);
        data->addr = res->start;
-       mutex_init(&data->lock);
        data->name = names[sio_data->kind];
        mutex_init(&data->update_lock);
 
@@ -1300,14 +1290,11 @@ static int __init f71805f_device_add(unsigned short address,
        if (err) {
                printk(KERN_ERR DRVNAME ": Device addition failed (%d)\n",
                       err);
-               goto exit_kfree_data;
+               goto exit_device_put;
        }
 
        return 0;
 
-exit_kfree_data:
-       kfree(pdev->dev.platform_data);
-       pdev->dev.platform_data = NULL;
 exit_device_put:
        platform_device_put(pdev);
 exit:
@@ -1400,10 +1387,7 @@ exit:
 
 static void __exit f71805f_exit(void)
 {
-       kfree(pdev->dev.platform_data);
-       pdev->dev.platform_data = NULL;
        platform_device_unregister(pdev);
-
        platform_driver_unregister(&f71805f_driver);
 }