linux-kernel - Re: PIIX4: DMA timeout issue

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Date:	Wed, 30 Jul 2008 21:43:37 +0200
From:	Bartlomiej Zolnierkiewicz <bzolnier@...il.com>
To:	gshan <gshan@...atel-lucent.com>
Cc:	Jeff Garzik <jeff@...zik.org>, linux-kernel@...r.kernel.org,
	Linux IDE mailing list <linux-ide@...r.kernel.org>,
	"Maciej W. Rozycki" <macro@...ux-mips.org>
Subject: Re: PIIX4: DMA timeout issue

On Wednesday 30 July 2008, gshan wrote:

[...]
 
> The IRQ routing issue has been fixed. IRQ routing system
> on my board is somewhat complicated: i8259->mlba (FPGA based
> PCI device)->MV64460(system controller). I forgot to set MV64460
> IRQ pin to level sensitive and edge sensitive was used, which caused
> interrupt lost finally. After changing this to level sensitive, everything
> seems fine. Now, the problem isn't interrupt lost, but suspending DMA
> operations.

Thanks for explaining this.

> > Also is the problem still present in 2.6.26 or 2.6.27-rc1?
> >
> > [ I don't see an information about the kernel version that is
> >   being used in either of threads? ]
> >   
> Sorry, I'm using 2.6.21 kernel.

Would be great to try with some recent one, the issue may have been
fixed already (which is quite likely given a number of bugfixes that
went in recent kernels).

Thanks,
Bart
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