• Rafael J. Wysocki's avatar
    ACPI / glue: Add .match() callback to struct acpi_bus_type · 53540098
    Rafael J. Wysocki authored
    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: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
    Acked-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    Acked-by: default avatarYinghai Lu <yinghai@kernel.org>
    Acked-by: default avatarJeff Garzik <jgarzik@pobox.com>
    53540098
pci-acpi.c 9.24 KB