linux-kernel - Re: [PATCHSET] libata: implement ->set

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Message-ID: <20100513181300.64be595a@lxorguk.ukuu.org.uk>
Date:	Thu, 13 May 2010 18:13:00 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	James Bottomley <James.Bottomley@...e.de>
Cc:	Tejun Heo <tj@...nel.org>, jeff@...zik.org,
	linux-ide@...r.kernel.org, jens.axboe@...cle.com,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	ben@...adent.org.uk
Subject: Re: [PATCHSET] libata: implement ->set_capacity()

On Thu, 13 May 2010 11:38:07 -0500
James Bottomley <James.Bottomley@...e.de> wrote:

> On Thu, 2010-05-13 at 18:22 +0200, Tejun Heo wrote:
> > > Instead of just saying unlock the HPA and show me the new capacity
> > > (with a rescan), you have to echo the right number of sectors to the
> > > set_capacity variable.  Isn't a hpa_unlock libata specific attribute
> > > better (you could even call BLKRRPART from the user context of the
> > > write)?
> > 
> > Hmmm... I lost you.  What are you talking about?
> 
> Instead of making this a block sysfs attribute, since HPA is SATA only,
> why not make it a libata attribute for the disk?

HPA is both PATA and SATA (and USB SCSI pass through ATA over SCSI etc
with some of the more functional USB/ATA bridges.

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