linux-kernel - Re: IDE DMA doesn't work with pata

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Message-ID: <552cad388461c04dc635c9e29128339f@localhost>
Date:	Thu, 11 Oct 2007 13:39:52 +0200
From:	<philipp@...wo.de>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: IDE DMA doesn't work with
	pata_via and compact flash card


On Thu, 11 Oct 2007 11:19:11 +0100, Alan Cox <alan@...rguk.ukuu.org.uk>
wrote:
>> ones, when using DMA. Turning off DMA for the old IDE drivers or
>> patching ata_generic to handle my IDE controller and then deactivating
>> DMA in the BIOS works, but then disk I/O is unbelievable slow.. do you
>> have any idea how to fix it, so that DMA works?
> 
> Does your CF/IDE adapter support DMA ?

Oh well, you're right.. there are still some CF/IDE adapters which do not
support DMA. I'll guess this is the problem then, so I'll return it to the
shop.

Best regards,
Philipp

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