linux-kernel - Re: [patch 10/50] libata: force hardreset if link is in powersave mode

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Message-ID: <4849FD02.9000901@garzik.org>
Date:	Fri, 06 Jun 2008 23:14:10 -0400
From:	Jeff Garzik <jeff@...zik.org>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
CC:	Chris Wright <chrisw@...s-sol.org>, linux-kernel@...r.kernel.org,
	stable@...nel.org,
	IDE/ATA development list <linux-ide@...r.kernel.org>,
	Justin Forbes <jmforbes@...uxtx.org>,
	Zwane Mwaikambo <zwane@....linux.org.uk>,
	Theodore Ts'o <tytso@....edu>,
	Randy Dunlap <rdunlap@...otime.net>,
	Dave Jones <davej@...hat.com>,
	Chuck Wolber <chuckw@...ntumlinux.com>,
	Chris Wedgwood <reviews@...cw.f00f.org>,
	Michael Krufky <mkrufky@...uxtv.org>,
	Chuck Ebbert <cebbert@...hat.com>,
	Domenico Andreoli <cavokz@...il.com>,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Tejun Heo <htejun@...il.com>, matthieu.castet@...rot.com,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: Re: [patch 10/50] libata: force hardreset if link is in powersave
 mode

Linus Torvalds wrote:
> 
> On Fri, 6 Jun 2008, Chris Wright wrote:
>> -stable review patch.  If anyone has any objections, please let us know.
>> ---------------------
>>
>> From: Tejun Heo <htejun@...il.com>
>>
>> Inhibiting link PM mode doesn't bring the link back online if it's
>> already in powersave mode.  If SRST is used in these cases, libata EH
>> thinks that the link is offline and fails detection.  Force hardreset
>> if link is in powersave mode.
> 
> This isn't upstream. Maybe there's some reason it's not needed upstream, 
> but it would be nice to know.

We do hard reset by default...

	Jeff



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