From: Tejun Heo <htejun@gmail.com>
To: Mark Lord <liml@rtr.ca>
Cc: Jeff Garzik <jgarzik@pobox.com>, Alan Cox <alan@redhat.com>,
IDE/ATA development list <linux-ide@vger.kernel.org>
Subject: Re: Port Multiplier drives not always all found on cold plug
Date: Sat, 17 May 2008 23:21:21 +0900 [thread overview]
Message-ID: <482EE9E1.5000805@gmail.com> (raw)
In-Reply-To: <482DCD1F.4090503@rtr.ca>
Mark Lord wrote:
> Mark Lord wrote:
>>
>>> So I guess the questions are:
>>>
>>> 1. Where are these unexpected interrupts coming from?
> ..
>
> Well, I'm still not sure of the source of the interrupt,
> but I did just now find an ancient bug in sata_mv,
> in it's internal handling of the port interrupt mask.
>
> The DONE_IRQ bit gets enabled a tad early in the EH sequence,
> enabling us to receive interrupts when we're not expecting them.
>
> Looks like that mv_unexpected_intr() function was useful after all. :)
>
> Patches forthcoming to clean this up, once I study things a bit more.
I've been studying things for last two days and discovered a number of
things. I'll soon post patch series. Thanks a lot for digging into PMP
stuff. It's great to have someone else's eyes on this stuff.
--
tejun
next prev parent reply other threads:[~2008-05-17 14:21 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-05-16 16:34 Port Multiplier drives not always all found on cold plug Mark Lord
2008-05-16 16:46 ` Mark Lord
2008-05-16 16:54 ` Mark Lord
2008-05-16 17:27 ` Mark Lord
2008-05-16 18:06 ` Mark Lord
2008-05-17 14:21 ` Tejun Heo [this message]
2008-05-17 17:32 ` Mark Lord
2008-05-17 17:52 ` Tejun Heo
2008-05-17 19:16 ` Mark Lord
2008-05-18 5:23 ` Tejun Heo
2008-06-02 3:38 ` JR Wilbert
2008-06-09 1:47 ` Tejun Heo
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