On Monday, November 04, 2013 01:21:46 AM Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx> > > The only substantial difference between acpi_bus_device_eject() and > acpi_bus_hot_remove_device() is the get_device() done by the former > which is supposed to be done by callers of the latter. However, > at least one caller of acpi_bus_hot_remove_device(), which is > handle_root_bridge_removal(), doesn't do that and generally it > won't be necessary to do that at all if ACPI handles, rather than > struct acpi_device objects, are passed between ACPI hotplug routines, > because the correctness of those routines already depends on the > persistence of ACPI handles (that may not be an entirely correct > assumption in theory, but in practice it has been good enough for a > long time). > > For this reason, modify acpi_bus_device_eject() to take two > arguments, an ACPI handle and event code, and make > acpi_bus_hot_remove_device() call it internally. Moreover, rework > acpi_bus_hot_remove_device() so that it only takes one argument, > an ACPI handle, and make acpi_scan_bus_device_check() queue up > acpi_bus_hot_remove_device() instead of acpi_bus_device_eject() > itself. After these changes, handle_root_bridge_removal() may > be replaced with async execution of acpi_bus_hot_remove_device() > with the ACPI handle of the root passed to it as the argument. > > However, since acpi_eject_store() also needs to execute > acpi_bus_device_eject() asynchronously and it needs to pass a > special event code, ACPI_OST_EC_OSPM_EJECT, to that function, > introduce a separate wrapper around acpi_bus_device_eject(), > acpi_eject_store_work(), that will be queued up by > acpi_eject_store() instead of acpi_bus_hot_remove_device(). > This allows acpi_eject_store() to be simplified and it allows > struct acpi_eject_event to be dropped entirely, as there's > no more users of that structure. Well, scratch this (and the follow-up), it didn't go in the right direction. I'll send a new series shortly. Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
