linux-kernel - Re: [PATCH 3/8] ideapad: make sure we bind on the correct device

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Message-ID: <4C6C9C36.7080904@canonical.com>
Date:	Thu, 19 Aug 2010 10:51:34 +0800
From:	Ike Panhc <ike.pan@...onical.com>
To:	Matthew Garrett <mjg59@...f.ucam.org>
CC:	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org, Thomas Renninger <trenn@...e.de>,
	Alan Cox <alan@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Corentin Chary <corentincj@...aif.net>,
	David Woodhouse <David.Woodhouse@...el.com>,
	Randy Dunlap <randy.dunlap@...cle.com>,
	Len Brown <len.brown@...el.com>
Subject: Re: [PATCH 3/8] ideapad: make sure we bind on the correct device

On 08/18/2010 09:27 PM, Matthew Garrett wrote:
> On Wed, Aug 18, 2010 at 04:37:33PM +0800, Ike Panhc wrote:
>> By reading from method _STA and _CFG to make sure we bind on the correct
>> VPC2004 device.
> 
> I know some other drivers check _STA themselves, but it's unnecessary - 
> if _STA didn't evaluate appropriately, the bus driver won't create the 
> pnp object and there won't be anything for you to bind to in the first 
> place.
> 
yes, you are right. when add, acpi_bus will check for it and tell if the
device exist or not from its bits.
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