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ACPI: dock: convert sysfs attributes to an attribute_group
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As suggested by Dmitry Torokhov, convert the individual sysfs
attributes into an attribute group.

This change eliminates quite a bit of copy/paste code in the
error handling paths.

Signed-off-by: Alex Chiang <achiang@hp.com>
Reviewed-by: Dmitry Torokhov <dtor@mail.ru>
Acked-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
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Alex Chiang authored and Len Brown committed Nov 3, 2009
1 parent 012abee commit 5f46c2f
Showing 1 changed file with 24 additions and 57 deletions.
81 changes: 24 additions & 57 deletions drivers/acpi/dock.c
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Original file line number Diff line number Diff line change
Expand Up @@ -936,6 +936,19 @@ static ssize_t show_dock_type(struct device *dev,
}
static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL);

static struct attribute *dock_attributes[] = {
&dev_attr_docked.attr,
&dev_attr_flags.attr,
&dev_attr_undock.attr,
&dev_attr_uid.attr,
&dev_attr_type.attr,
NULL
};

static struct attribute_group dock_attribute_group = {
.attrs = dock_attributes
};

/**
* dock_add - add a new dock station
* @handle: the dock station handle
Expand Down Expand Up @@ -969,9 +982,8 @@ static int dock_add(acpi_handle handle)
dock_station_count, NULL, 0);
dock_device = dock_station->dock_device;
if (IS_ERR(dock_device)) {
kfree(dock_station);
dock_station = NULL;
return PTR_ERR(dock_device);
ret = PTR_ERR(dock_device);
goto out;
}
platform_device_add_data(dock_device, &dock_station,
sizeof(struct dock_station *));
Expand All @@ -986,47 +998,9 @@ static int dock_add(acpi_handle handle)
if (is_battery(handle))
dock_station->flags |= DOCK_IS_BAT;

ret = device_create_file(&dock_device->dev, &dev_attr_docked);
if (ret) {
printk(KERN_ERR "Error %d adding sysfs file\n", ret);
platform_device_unregister(dock_device);
kfree(dock_station);
dock_station = NULL;
return ret;
}
ret = device_create_file(&dock_device->dev, &dev_attr_undock);
if (ret) {
printk(KERN_ERR "Error %d adding sysfs file\n", ret);
device_remove_file(&dock_device->dev, &dev_attr_docked);
platform_device_unregister(dock_device);
kfree(dock_station);
dock_station = NULL;
return ret;
}
ret = device_create_file(&dock_device->dev, &dev_attr_uid);
if (ret) {
printk(KERN_ERR "Error %d adding sysfs file\n", ret);
device_remove_file(&dock_device->dev, &dev_attr_docked);
device_remove_file(&dock_device->dev, &dev_attr_undock);
platform_device_unregister(dock_device);
kfree(dock_station);
dock_station = NULL;
return ret;
}
ret = device_create_file(&dock_device->dev, &dev_attr_flags);
if (ret) {
printk(KERN_ERR "Error %d adding sysfs file\n", ret);
device_remove_file(&dock_device->dev, &dev_attr_docked);
device_remove_file(&dock_device->dev, &dev_attr_undock);
device_remove_file(&dock_device->dev, &dev_attr_uid);
platform_device_unregister(dock_device);
kfree(dock_station);
dock_station = NULL;
return ret;
}
ret = device_create_file(&dock_device->dev, &dev_attr_type);
ret = sysfs_create_group(&dock_device->dev.kobj, &dock_attribute_group);
if (ret)
printk(KERN_ERR"Error %d adding sysfs file\n", ret);
goto err_unregister;

/* Find dependent devices */
acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
Expand All @@ -1036,26 +1010,23 @@ static int dock_add(acpi_handle handle)
/* add the dock station as a device dependent on itself */
dd = alloc_dock_dependent_device(handle);
if (!dd) {
kfree(dock_station);
dock_station = NULL;
ret = -ENOMEM;
goto dock_add_err_unregister;
goto err_rmgroup;
}
add_dock_dependent_device(dock_station, dd);

dock_station_count++;
list_add(&dock_station->sibling, &dock_stations);
return 0;

dock_add_err_unregister:
device_remove_file(&dock_device->dev, &dev_attr_type);
device_remove_file(&dock_device->dev, &dev_attr_docked);
device_remove_file(&dock_device->dev, &dev_attr_undock);
device_remove_file(&dock_device->dev, &dev_attr_uid);
device_remove_file(&dock_device->dev, &dev_attr_flags);
err_rmgroup:
sysfs_remove_group(&dock_device->dev.kobj, &dock_attribute_group);
err_unregister:
platform_device_unregister(dock_device);
out:
kfree(dock_station);
dock_station = NULL;
printk(KERN_ERR "%s encountered error %d\n", __func__, ret);
return ret;
}

Expand All @@ -1076,11 +1047,7 @@ static int dock_remove(struct dock_station *dock_station)
kfree(dd);

/* cleanup sysfs */
device_remove_file(&dock_device->dev, &dev_attr_type);
device_remove_file(&dock_device->dev, &dev_attr_docked);
device_remove_file(&dock_device->dev, &dev_attr_undock);
device_remove_file(&dock_device->dev, &dev_attr_uid);
device_remove_file(&dock_device->dev, &dev_attr_flags);
sysfs_remove_group(&dock_device->dev.kobj, &dock_attribute_group);
platform_device_unregister(dock_device);

/* free dock station memory */
Expand Down

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