From: Tejun Heo <tj@kernel.org>
To: Mac Lin <mkl0301@gmail.com>
Cc: linux-ide@vger.kernel.org
Subject: Re: Question regarding PORT_IRQ_BAD_PMP (Re: AHCI support Port Multiplier problem.)
Date: Tue, 15 Feb 2011 09:55:04 +0100 [thread overview]
Message-ID: <20110215085504.GA3160@htj.dyndns.org> (raw)
In-Reply-To: <loom.20110215T051458-468@post.gmane.org>
Hello,
(please always reply-to-all)
On Tue, Feb 15, 2011 at 07:48:18AM +0000, Mac Lin wrote:
> It seems that the PORT_IRQ_BAD_PMP is not getting cleared, or, asserted every
> time when it "received a FIS from a device that did not have a command
> outstanding", which is the D2H FIS of softreset.
>
> The sb600, which I assume the code work correctly, seems doesn't have this
> problem. So I am wondering that whether is this the right behavior on cns3xxx,
> or and just another issue of the chip?
You're already working around buggy hardware. It isn't surprising
that both behave incorrectly in their own separate ways. Just do
what's necessary to get the hardware working as long as the workaround
is localized to the specific controller.
Good luck.
--
tejun
next prev parent reply other threads:[~2011-02-15 8:55 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
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 [this message]
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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