linux-kernel - Re: [PATCH 2.6.28-rc2] sata

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Message-ID: <18694.65280.371472.203936@harpo.it.uu.se>
Date:	Tue, 28 Oct 2008 13:01:04 +0100
From:	Mikael Pettersson <mikpe@...uu.se>
To:	Tejun Heo <tj@...nel.org>
Cc:	Mikael Pettersson <mikpe@...uu.se>, jgarzik@...ox.com,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	stable@...nel.org
Subject: Re: [PATCH 2.6.28-rc2] sata_promise: proper hardreset

Tejun Heo writes:
 > Hello, Mikael.
 > 
 > Mikael Pettersson wrote:
 > > +static int pdc_pata_hardreset(struct ata_link *link, unsigned int *class,
 > > +			      unsigned long deadline)
 > > +{
 > > +	pdc_reset_port(link->ap);
 > > +	return 0;
 > > +}
 > 
 > You either need to return -EAGAIN here to ask for follow-up SRST or
 > override softreset.  I think pdc_reset_port() doesn't actually reset the
 > ATA channel, right?  In that case, the latter would be the correct thing
 > to do.

(ponders..) ah yes, pata normally skips hardreset so this would
make it skip the needed softreset. pdc_reset_port() just reinits
the ATA engine, nothing else should be affected.

I'll update the patch to make pata override ->softreset instead.

Thanks.

/Mikael
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