Re: [Resend][PATCH] ACPI / glue: Drop .find_bridge() callback from struct acpi_bus_type

From: Rafael J. Wysocki
Date: Wed Feb 27 2013 - 20:05:24 EST

On Wednesday, February 27, 2013 02:20:32 PM Greg Kroah-Hartman wrote:
> On Wed, Feb 27, 2013 at 11:06:52PM +0100, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
> >
> > After PCI has stopped using the .find_bridge() callback in
> > struct acpi_bus_type, the only remaining users of it are SATA and
> > USB. However, SATA only pretends to be a user, because it points
> > that callback to a stub always returning -ENODEV, and USB uses it
> > 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.
> Ick, that's not good. Can you have the original creator of that code
> (someone else from Intel, I can't remember at the moment), fix that up
> properly and send me patches?

That won't be necessary afer this patch. Or do you want to fix up USB
separately first?


I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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