linux-kernel - Re: [PATCH] libata: remove dead code from libata-acpi.c

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Message-ID: <51BFB499.9050302@huawei.com>
Date:	Tue, 18 Jun 2013 09:15:05 +0800
From:	"Jiang Liu (Gerry)" <jiang.liu@...wei.com>
To:	Tejun Heo <tj@...nel.org>
CC:	Matthew Garrett <mjg@...hat.com>, Aaron Lu <aaron.lu@...el.com>,
	Liu Jiang <liuj97@...il.com>, Liu Jiang <liu97@...il.com>,
	<linux-ide@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] libata: remove dead code from libata-acpi.c

On 2013/6/18 2:01, Tejun Heo wrote:
> On Mon, Jun 17, 2013 at 09:50:20AM +0800, Aaron Lu wrote:
>> On 06/15/2013 11:02 AM, Liu Jiang wrote:
>>> From: Liu Jiang <liu97@...il.com>
>>>
>>> Commit 30dcf76acc69 "libata: migrate ACPI code over to new bindings"
>>> removed ACPI dock notification related code, but there's some dead
>>> code left, so clean up it.
>>
>> I never noticed this, but it looks to be the case...
>>
>> I'm not sure the dock notification code is removed intentionally or
>> mistakenly though, if it is a mistake, then instead of removing the left
>> code here, we probably should add the dock notification code back.
>>
>> But I have no test system or any knowledge about how ata dock works, so
>> I may be wrong :-)
>
> Looks like a regression to me.  We're probably locking up on some
> older laptops which connects optical drives with hotpluggable PATA.
> Matthew, can you please fix it?
>
> Thanks.
>
Yeah, Aaron is right. We should restore the dock notification
handler to support ATA hotplug on some IBM laptops.
Regards!
Gerry

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