From: Mark Lord <liml@rtr.ca>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Tejun Heo <htejun@gmail.com>,
IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: Re: ops->qc_defer not invoked on ata_exec_internal_sg() paths ?
Date: Tue, 26 Feb 2008 10:47:42 -0500 [thread overview]
Message-ID: <47C4349E.5010802@rtr.ca> (raw)
In-Reply-To: <20080226123209.7ca9eed4@core>
Alan Cox wrote:
> On Mon, 25 Feb 2008 19:20:59 -0500
> Mark Lord <liml@rtr.ca> wrote:
>
>> The optional .qc_defer() methods don't seem to be called
>> on the ata_exec_internal_sg() path.
>>
>> At present, this is probably okay. But in the future,
>> as we add functionality for link power management
>> and hotplug polling, this could be a problem.
>
> It becomes a problem for me certainly if we ever issue anything via
> exec_internal_sg while another command may be outstanding anywhere on the
> same *host*. Right now its ok.
..
Yeah, for serializing a pair of ATA channels on the same host chip.
-ml
prev parent reply other threads:[~2008-02-26 15:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-26 0:20 ops->qc_defer not invoked on ata_exec_internal_sg() paths ? Mark Lord
2008-02-26 1:37 ` Tejun Heo
2008-02-26 12:32 ` Alan Cox
2008-02-26 15:47 ` Mark Lord [this message]
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