acpiphp_glue.c

			return;
		}
		bridge->context = context;
		context->bridge = bridge;
		/* Get a reference to the parent bridge. */
		get_bridge(context->func.parent);
		mutex_unlock(&acpiphp_context_lock);
	}

	/* must be added to the list prior to calling register_slot */
	mutex_lock(&bridge_mutex);
	list_add(&bridge->list, &bridge_list);
	mutex_unlock(&bridge_mutex);

	/* register all slot objects under this bridge */
	status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
				     register_slot, NULL, bridge, NULL);
	if (ACPI_FAILURE(status)) {
		acpi_handle_err(handle, "failed to register slots\n");
		cleanup_bridge(bridge);
		put_bridge(bridge);
	}
}

/* Destroy hotplug slots associated with the PCI bus */
void acpiphp_remove_slots(struct pci_bus *bus)
{
	struct acpiphp_bridge *bridge;

	if (acpiphp_disabled)
		return;

	mutex_lock(&bridge_mutex);
	list_for_each_entry(bridge, &bridge_list, list)
		if (bridge->pci_bus == bus) {
			mutex_unlock(&bridge_mutex);
			cleanup_bridge(bridge);
			put_bridge(bridge);
			return;
		}

	mutex_unlock(&bridge_mutex);
}

/**
 * acpiphp_enable_slot - power on slot
 * @slot: ACPI PHP slot
 */
int acpiphp_enable_slot(struct acpiphp_slot *slot)
{
	mutex_lock(&slot->crit_sect);
	/* configure all functions */
	if (!(slot->flags & SLOT_ENABLED))
		enable_slot(slot);

	mutex_unlock(&slot->crit_sect);
	return 0;
}

/**
 * acpiphp_disable_and_eject_slot - power off and eject slot
 * @slot: ACPI PHP slot
 */
int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot)
{
	struct acpiphp_func *func;
	int retval = 0;

	mutex_lock(&slot->crit_sect);

	/* unconfigure all functions */
	disable_slot(slot);

	list_for_each_entry(func, &slot->funcs, sibling)
		if (func->flags & FUNC_HAS_EJ0) {
			acpi_handle handle = func_to_handle(func);

			if (ACPI_FAILURE(acpi_evaluate_ej0(handle)))
				acpi_handle_err(handle, "_EJ0 failed\n");

			break;
		}

	mutex_unlock(&slot->crit_sect);
	return retval;
}


/*
 * slot enabled:  1
 * slot disabled: 0
 */
u8 acpiphp_get_power_status(struct acpiphp_slot *slot)
{
	return (slot->flags & SLOT_ENABLED);
}


/*
 * latch   open:  1
 * latch closed:  0
 */
u8 acpiphp_get_latch_status(struct acpiphp_slot *slot)
{
	return !(get_slot_status(slot) & ACPI_STA_DEVICE_UI);
}


/*
 * adapter presence : 1
 *          absence : 0
 */
u8 acpiphp_get_adapter_status(struct acpiphp_slot *slot)
{
	return !!get_slot_status(slot);
}