On Wed, 15 Sep 2010 15:58:02 -0400 Matthew Garrett wrote:
> When undocking, it's helpful to know which devices are going to disappear.
> This patch adds support for adding symlinks to the device into the docking
> bay.
>
> Signed-off-by: Matthew Garrett <mjg@xxxxxxxxxx>
> ---
> drivers/acpi/dock.c | 82 +++++++++++++++++++++++++++++++++++++++++++
> include/acpi/acpi_drivers.h | 10 +++++
> 2 files changed, 92 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
> index 3fe29e9..685aac9 100644
> --- a/drivers/acpi/dock.c
> +++ b/drivers/acpi/dock.c
> @@ -276,6 +276,88 @@ int is_dock_device(acpi_handle handle)
> EXPORT_SYMBOL_GPL(is_dock_device);
>
> /**
> + *
> + * dock_link_device - link a device from the dock
> + * @handle: acpi handle of the potentially dependent device
> + *
> + */
Nope, kernel-doc does not allow extra line(s) between the beginning /**
and the function name. Please delete that above & below.
> +struct device **dock_link_device(acpi_handle handle)
> +{
> + struct device *dev = acpi_get_physical_device(handle);
> + struct dock_station *dock_station;
> + int ret, dock = 0;
> + struct device **devices;
> +
> + devices = kmalloc(dock_station_count * sizeof(struct device *),
> + GFP_KERNEL);
> +
> + if (!dev)
> + return NULL;
> +
> + if (is_dock(handle)) {
> + put_device(dev);
> + return NULL;
> + }
> +
> + list_for_each_entry(dock_station, &dock_stations, sibling) {
> + if (find_dock_dependent_device(dock_station, handle)) {
> + ret = sysfs_create_link(&dock_station->dock_device->dev.kobj,
> + &dev->kobj, dev_name(dev));
> + WARN_ON(ret);
> + devices[dock] = &dock_station->dock_device->dev;
> + dock++;
> + }
> + }
> + if (!dock)
> + put_device(dev);
> +
> + devices[dock] = NULL;
> + return devices;
> +}
> +EXPORT_SYMBOL_GPL(dock_link_device);
> +
> +/**
> + *
> + * dock_unlink_device - unlink a device from the dock
> + * @handle: acpi handle of the potentially dependent device
> + *
> + */
> +struct device **dock_unlink_device(acpi_handle handle)
> +{
> + struct device *dev = acpi_get_physical_device(handle);
> + struct dock_station *dock_station;
> + int dock = 0;
> + struct device **devices =
> + kmalloc(dock_station_count * sizeof(struct device *),
> + GFP_KERNEL);
> +
> + if (!dev)
> + return NULL;
> +
> + if (is_dock(handle)) {
> + put_device(dev);
> + return NULL;
> + }
> +
> + list_for_each_entry(dock_station, &dock_stations, sibling) {
> + if (find_dock_dependent_device(dock_station, handle)) {
> + sysfs_remove_link(&dock_station->dock_device->dev.kobj,
> + dev_name(dev));
> + devices[dock] = &dock_station->dock_device->dev;
> + dock++;
> + }
> + }
> + /* An extra reference has been held while the link existed */
> + if (dock)
> + put_device(dev);
> +
> + put_device(dev);
> + devices[dock] = NULL;
> + return devices;
> +}
> +EXPORT_SYMBOL_GPL(dock_unlink_device);
> +
> +/**
> * dock_present - see if the dock station is present.
> * @ds: the dock station
> *
---
~Randy
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