linux-kernel - Re: Vortex86SX: only works with irqpoll

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Date:	Fri, 20 Nov 2009 14:55:18 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Otavio Salvador <otavio@...ystems.com.br>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Vortex86SX: only works with irqpoll

On Thu, 19 Nov 2009 19:11:49 -0200
Otavio Salvador <otavio@...ystems.com.br> wrote:

> Hello,
> 
> I got this machine working booting it with "irqpoll" parameter however
> it drops the performance a lot and I'd like to try to fix the root
> problem of it.
> 
> Without 'irqpoll' the disk and network adaptor doesn't work.

That implies the IRQ routing is failing which usually but not always
means the tables in the firmware are wrong. The first step would probably
be to dump all the relevant PCI register space and the ACPI tables and
compare them with the IRQ routing documentation for the chipset.

Actually no - thats step 2, step 1 is asking the vendor if there is
updated firmware to fix IRQ delivery problems
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