linux-kernel - Re: PIIX4: DMA timeout issue

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Date:	Thu, 31 Jul 2008 09:00:10 +0800
From:	gshan <gshan@...atel-lucent.com>
To:	Bartlomiej Zolnierkiewicz <bzolnier@...il.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

Bartlomiej Zolnierkiewicz wrote:
> 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).
>   
I tried to searched in bugzilla.kernel.org and didn't find
there has fix on this issue. Yesterday, Jeff suggested me
to turn to ata driver for PIIX4. I tried this yesterday but still
have some problems to make PIIX4 workable under ata
driver. I will continue working on this today.

Gavin

> Thanks,
> Bart
>   

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