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From: Tejun Heo <htejun@gmail.com>
To: Mark Lord <liml@rtr.ca>
Cc: 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 10:37:31 +0900	[thread overview]
Message-ID: <47C36D5B.7080600@gmail.com> (raw)
In-Reply-To: <47C35B6B.8000406@rtr.ca>

Hello, Mark.

Mark Lord 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.
> 
> I think.  Or is it possibly also a problem today
> for sata_send_pmp() and friends ?

That's intentional and okay.  Currently, EH can only issue one non-NCQ
command at a time and dynamic link PM and hotplug polling shouldn't be
done via EH anyway.  EH is way too big a hammer for those.

Thanks.

-- 
tejun

  reply	other threads:[~2008-02-26  1:37 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 [this message]
2008-02-26 12:32 ` Alan Cox
2008-02-26 15:47   ` Mark Lord

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