From: Tejun Heo <tj@kernel.org>
To: Robert Hancock <hancockrwd@gmail.com>
Cc: Luo Dislo <dislo_b_j@yahoo.com.tw>,
jgarzik@pobox.com, linux-ide@vger.kernel.org
Subject: Re: AHCI support Port Multiplier problem.
Date: Tue, 11 Jan 2011 15:39:19 +0100 [thread overview]
Message-ID: <20110111143919.GF30607@htj.dyndns.org> (raw)
In-Reply-To: <4D2BB855.5070703@gmail.com>
Hello,
On Mon, Jan 10, 2011 at 07:54:29PM -0600, Robert Hancock wrote:
> I suspect that retrying with PMP=0 if the softreset with PMP=15
> failed to acquire a signature is likely the thing to do.
Of the non-platform ones, sb600 is the only one with this problem and
the workaround will unnecessarily lengthen response time for other
controllers. I'd suggest implementing it as a quirk in libahci.c and
applying it only to the broken controllers.
Thanks.
--
tejun
next prev parent reply other threads:[~2011-01-11 14:39 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-07 2:55 AHCI support Port Multiplier problem Luo Dislo
2011-01-07 21:25 ` Tejun Heo
2011-01-10 1:46 ` Luo Dislo
2011-01-10 15:42 ` Mac Lin
2011-01-11 1:54 ` Robert Hancock
2011-01-11 14:39 ` Tejun Heo [this message]
2011-01-11 14:37 ` Tejun Heo
2011-01-12 1:26 ` Luo Dislo
2011-01-13 8:16 ` Luo Dislo
2011-02-15 7:48 ` Question regarding PORT_IRQ_BAD_PMP (Re: AHCI support Port Multiplier problem.) Mac Lin
2011-02-15 8:55 ` Tejun Heo
2011-02-15 9:50 ` Lin Mac
2011-02-15 10:03 ` Tejun Heo
2011-02-15 10:26 ` Lin Mac
2011-02-15 10:31 ` Tejun Heo
2011-02-15 13:00 ` Lin Mac
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