ata_hotplug_data
struct ata_device *dev = ata_hotplug_data(adev->hp).dev;
ata_acpi_handle_hotplug(ata_hotplug_data(adev->hp).ap, NULL, event);
ata_acpi_uevent(ata_hotplug_data(adev->hp).ap, NULL, event);
struct ata_device *dev = ata_hotplug_data(adev->hp).dev;