Re: IT821x: no DMA since 2.6.21
- From: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
- Date: Tue, 15 May 2007 12:31:32 +0100
On Tue, 15 May 2007 12:53:08 +0200
Thomas Kuther <gimpel@xxxxxxxxxxxxxxxx> wrote:
Hi!
Since 2.6.21 I have a problem with the it821x driver on my ITE 8212
controller.
Now I saw some updates to it821x in 2.6.22-rc1 and gave that a try, but
the problem persists.
I've had multiple reports of this. I would recommend you use the libata
driver. IT821x hasn't changed over the past few releases so its someting
in the core IDE code that broke it [note it might not of course be that
the problem is in the core code..].
I have no plans at this point to debug the old IT821x driver due to time
constraints, and if anyone wants to have a crack at debugging this and
fixing it go for it.
BTW: I also note you have the controller in smart mode but are not using
the hardware raid functions. In that situation it generally runs faster
(and does CD-ROM) if you flash the ATAPI firmware to the controller or
boot with the noraid option "it8212.noraid=1"
Alan
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