From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Mikael Pettersson <mikpe@it.uu.se>
Cc: linux-ide@vger.kernel.org, Tejun Heo <tj@kernel.org>
Subject: Re: 2.6.33-rc2 pata_macio fails to detect PMac G3 CD-drive
Date: Thu, 14 Jan 2010 06:58:12 +1100 [thread overview]
Message-ID: <1263412692.724.222.camel@pasglop> (raw)
In-Reply-To: <19277.51029.197524.477689@pilspetsen.it.uu.se>
On Wed, 2010-01-13 at 14:15 +0100, Mikael Pettersson wrote:
> Seems to me the "irq 30: nobody cared" and "Disabling IRQ #30"
> are the real problems. Is the pata_macio irq handler registered
> too late, or does it ignore the interrupt?
It's getting an interrupt it doesn't expect around the reset. The
ata freeze code actually tries to prevent that with a read of
the status register but that doesn't appear to work. I think it's
a bug in the drive FW but I'm not sure of the details.
I'll try to make up a workaround involving masking the interrupt
until the first taskfile completes. I'll send you a patch to test
when I find time to write it.
Cheers
Ben.
prev parent reply other threads:[~2010-01-13 20:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-26 17:18 2.6.33-rc2 pata_macio fails to detect PMac G3 CD-drive Mikael Pettersson
2009-12-26 20:52 ` Benjamin Herrenschmidt
2010-01-11 5:12 ` Benjamin Herrenschmidt
2010-01-11 7:01 ` Tejun Heo
2010-01-11 9:41 ` Benjamin Herrenschmidt
2010-01-12 0:35 ` Tejun Heo
2010-01-12 0:35 ` Benjamin Herrenschmidt
2010-01-13 13:15 ` Mikael Pettersson
2010-01-13 19:58 ` Benjamin Herrenschmidt [this message]
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