fedora core 6 1.2949 + vserver 2.2.0

[linux-2.6.git] / drivers / i2c / chips / pcf8591.c

diff --git a/drivers/i2c/chips/pcf8591.c b/drivers/i2c/chips/pcf8591.c
index 925a6b3..4dc3637 100644 (file)
--- a/drivers/i2c/chips/pcf8591.c
+++ b/drivers/i2c/chips/pcf8591.c
@@ -158,6 +158,28 @@ static ssize_t set_out0_enable(struct device *dev, struct device_attribute *attr
 static DEVICE_ATTR(out0_enable, S_IWUSR | S_IRUGO, 
                   show_out0_enable, set_out0_enable);
 
+static struct attribute *pcf8591_attributes[] = {
+       &dev_attr_out0_enable.attr,
+       &dev_attr_out0_output.attr,
+       &dev_attr_in0_input.attr,
+       &dev_attr_in1_input.attr,
+       NULL
+};
+
+static const struct attribute_group pcf8591_attr_group = {
+       .attrs = pcf8591_attributes,
+};
+
+static struct attribute *pcf8591_attributes_opt[] = {
+       &dev_attr_in2_input.attr,
+       &dev_attr_in3_input.attr,
+       NULL
+};
+
+static const struct attribute_group pcf8591_attr_group_opt = {
+       .attrs = pcf8591_attributes_opt,
+};
+
 /*
  * Real code
  */
@@ -211,24 +233,31 @@ static int pcf8591_detect(struct i2c_adapter *adapter, int address, int kind)
        pcf8591_init_client(new_client);
 
        /* Register sysfs hooks */
-       device_create_file(&new_client->dev, &dev_attr_out0_enable);
-       device_create_file(&new_client->dev, &dev_attr_out0_output);
-       device_create_file(&new_client->dev, &dev_attr_in0_input);
-       device_create_file(&new_client->dev, &dev_attr_in1_input);
+       err = sysfs_create_group(&new_client->dev.kobj, &pcf8591_attr_group);
+       if (err)
+               goto exit_detach;
 
        /* Register input2 if not in "two differential inputs" mode */
-       if (input_mode != 3 )
-               device_create_file(&new_client->dev, &dev_attr_in2_input);
-               
+       if (input_mode != 3) {
+               if ((err = device_create_file(&new_client->dev,
+                                             &dev_attr_in2_input)))
+                       goto exit_sysfs_remove;
+       }
+
        /* Register input3 only in "four single ended inputs" mode */
-       if (input_mode == 0)
-               device_create_file(&new_client->dev, &dev_attr_in3_input);
-       
+       if (input_mode == 0) {
+               if ((err = device_create_file(&new_client->dev,
+                                             &dev_attr_in3_input)))
+                       goto exit_sysfs_remove;
+       }
+
        return 0;
-       
-       /* OK, this is not exactly good programming practice, usually. But it is
-          very code-efficient in this case. */
 
+exit_sysfs_remove:
+       sysfs_remove_group(&new_client->dev.kobj, &pcf8591_attr_group_opt);
+       sysfs_remove_group(&new_client->dev.kobj, &pcf8591_attr_group);
+exit_detach:
+       i2c_detach_client(new_client);
 exit_kfree:
        kfree(data);
 exit:
@@ -239,6 +268,9 @@ static int pcf8591_detach_client(struct i2c_client *client)
 {
        int err;
 
+       sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group_opt);
+       sysfs_remove_group(&client->dev.kobj, &pcf8591_attr_group);
+
        if ((err = i2c_detach_client(client)))
                return err;