From 53540098b23c3884b4a0b4f220b9d977bc496af3 Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Sun, 3 Mar 2013 22:35:20 +0100 Subject: ACPI / glue: Add .match() callback to struct acpi_bus_type USB uses the .find_bridge() callback from struct acpi_bus_type incorrectly, because as a result of the way it is used by USB every device in the system that doesn't have a bus type or parent is passed to usb_acpi_find_device() for inspection. What USB actually needs, though, is to call usb_acpi_find_device() for USB ports that don't have a bus type defined, but have usb_port_device_type as their device type, as well as for USB devices. To fix that replace the struct bus_type pointer in struct acpi_bus_type used for matching devices to specific subsystems with a .match() callback to be used for this purpose and update the users of struct acpi_bus_type, including USB, accordingly. Define the .match() callback routine for USB, usb_acpi_bus_match(), in such a way that it will cover both USB devices and USB ports and remove the now redundant .find_bridge() callback pointer from usb_acpi_bus. Signed-off-by: Rafael J. Wysocki Acked-by: Greg Kroah-Hartman Acked-by: Yinghai Lu Acked-by: Jeff Garzik --- drivers/acpi/glue.c | 39 +++++++++++++-------------------------- 1 file changed, 13 insertions(+), 26 deletions(-) (limited to 'drivers/acpi') diff --git a/drivers/acpi/glue.c b/drivers/acpi/glue.c index ef6f155469b..b94d14721af 100644 --- a/drivers/acpi/glue.c +++ b/drivers/acpi/glue.c @@ -36,12 +36,11 @@ int register_acpi_bus_type(struct acpi_bus_type *type) { if (acpi_disabled) return -ENODEV; - if (type && type->bus && type->find_device) { + if (type && type->match && type->find_device) { down_write(&bus_type_sem); list_add_tail(&type->list, &bus_type_list); up_write(&bus_type_sem); - printk(KERN_INFO PREFIX "bus type %s registered\n", - type->bus->name); + printk(KERN_INFO PREFIX "bus type %s registered\n", type->name); return 0; } return -ENODEV; @@ -56,24 +55,21 @@ int unregister_acpi_bus_type(struct acpi_bus_type *type) down_write(&bus_type_sem); list_del_init(&type->list); up_write(&bus_type_sem); - printk(KERN_INFO PREFIX "ACPI bus type %s unregistered\n", - type->bus->name); + printk(KERN_INFO PREFIX "bus type %s unregistered\n", + type->name); return 0; } return -ENODEV; } EXPORT_SYMBOL_GPL(unregister_acpi_bus_type); -static struct acpi_bus_type *acpi_get_bus_type(struct bus_type *type) +static struct acpi_bus_type *acpi_get_bus_type(struct device *dev) { struct acpi_bus_type *tmp, *ret = NULL; - if (!type) - return NULL; - down_read(&bus_type_sem); list_for_each_entry(tmp, &bus_type_list, list) { - if (tmp->bus == type) { + if (tmp->match(dev)) { ret = tmp; break; } @@ -261,26 +257,17 @@ err: static int acpi_platform_notify(struct device *dev) { - struct acpi_bus_type *type; + struct acpi_bus_type *type = acpi_get_bus_type(dev); acpi_handle handle; int ret; ret = acpi_bind_one(dev, NULL); - if (ret && (!dev->bus || !dev->parent)) { - /* bridge devices genernally haven't bus or parent */ - ret = acpi_find_bridge_device(dev, &handle); - if (!ret) { - ret = acpi_bind_one(dev, handle); - if (ret) - goto out; - } - } - - type = acpi_get_bus_type(dev->bus); if (ret) { - if (!type || !type->find_device) { - DBG("No ACPI bus support for %s\n", dev_name(dev)); - ret = -EINVAL; + if (!type) { + ret = acpi_find_bridge_device(dev, &handle); + if (!ret) + ret = acpi_bind_one(dev, handle); + goto out; } @@ -316,7 +303,7 @@ static int acpi_platform_notify_remove(struct device *dev) { struct acpi_bus_type *type; - type = acpi_get_bus_type(dev->bus); + type = acpi_get_bus_type(dev); if (type && type->cleanup) type->cleanup(dev); -- cgit v1.2.3