Re: [RFC PATCH 0/8] ACPI: change the way of enumerating PNPACPI/Platform devices

From: Zhang Rui <rui.zhang@intel.com>
To: Matthew Garrett <matthew.garrett@nebula.com>
Cc: "dmitry.torokhov@gmail.com" <dmitry.torokhov@gmail.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"bhelgaas@google.com" <bhelgaas@google.com>,
	"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
	"rafael.j.wysocki@intel.com" <rafael.j.wysocki@intel.com>
Subject: Re: [RFC PATCH 0/8] ACPI: change the way of enumerating PNPACPI/Platform devices
Date: Mon, 03 Mar 2014 21:50:14 +0800	[thread overview]
Message-ID: <1393854614.2193.4.camel@rzhang1-mobl4> (raw)
In-Reply-To: <1393433267.14900.3.camel@x230>

On Wed, 2014-02-26 at 16:47 +0000, Matthew Garrett wrote:
> On Wed, 2014-02-26 at 17:11 +0800, Zhang Rui wrote:
> 
> > 1. without the patch, the acpi_platform scan handler white list is
> >    continuously growing.
> > 2. with the patch set, the PNPACPI scan handler white list will become
> >    smaller and smaller by
> >    a) remove the ids from the PNPACPI white list, for the devices
> >       that are never enumerated via ACPI
> >    b) remove the ids from the PNPACPI whilte list and convert the drivers to
> >       platform bus drivers, for the devices that are not PNP devices in nature.
> >    which will be done later.
> 
> I agree that this is the right direction to go in. The number of acpipnp
> devices that are also pnpbios or (even worse) isapnp is (a) unlikely to
> increase, and (b) *very* small, and pretty much limited to superio and a
> small number of sound cards on old laptops. We may come up with a better
> solution for them later, but right now shifting away from requiring that
> every new ACPI device driver also bump a whitelist is an improvement.
> 
thanks for your comments, Matthew.

thanks,
rui