From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tejun Heo <tj@kernel.org>
Subject: Re: reenable DMA
Date: Tue, 11 Nov 2008 17:41:21 +0900
Message-ID: <49194531.1000802@kernel.org>
References: <gedae1$ari$1@ger.gmane.org>
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To: kenneth johansson <ken@kenjo.org>
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kenneth johansson wrote:
> I have a small problem where my DVD player got confused by a disk
> and the ata driver ended up putting the driver in PIO mode. 
> 
> Now I need to get it back into DMA without rebooting the computer. 
> 
>  hdparm -d1 /dev/sr0

Sorry it isn't implemented yet but why does libata get confused in the
first place?  Care to post logs?

Thanks.

-- 
tejun