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usb: Bind devices to ACPI devices when possible

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Built-in USB devices will typically have a representation in the system
ACPI tables. Add support for binding the two together so the USB code can
make use of the associated methods.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Matthew Garrett 2012-05-11 16:08:27 +08:00 • committed by Greg Kroah-Hartman
parent 38ac0f1b90
commit da0af6e78e
4 changed files with 74 additions and 0 deletions
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6
drivers/usb/core/usb.c
View file

@ -1015,6 +1015,9 @@ static int __init usb_init(void)
if (retval)
goto out;
retval = usb_acpi_register();
if (retval)
goto acpi_register_failed;
retval = bus_register(&usb_bus_type);
if (retval)
goto bus_register_failed;
@ -1049,6 +1052,8 @@ major_init_failed:
bus_notifier_failed:
bus_unregister(&usb_bus_type);
bus_register_failed:
usb_acpi_unregister();
acpi_register_failed:
usb_debugfs_cleanup();
out:
return retval;
@ -1070,6 +1075,7 @@ static void __exit usb_exit(void)
usb_hub_cleanup();
bus_unregister_notifier(&usb_bus_type, &usb_bus_nb);
bus_unregister(&usb_bus_type);
usb_acpi_unregister();
usb_debugfs_cleanup();
}