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Re: [PATCH 1/2] ide: Add tx4939ide driver

Subject: Re: [PATCH 1/2] ide: Add tx4939ide driver
From: Atsushi Nemoto <>
Date: Fri, 12 Sep 2008 00:03:49 +0900 (JST)
In-reply-to: <>
Original-recipient: rfc822;
References: <> <> <>
On Wed, 10 Sep 2008 19:55:16 +0400, Sergei Shtylyov <> 
> > But the "Command Transfer Mode Select" bits affects access timings on
> > setting task registers for DMA command.
>     So what? PIO and DMA are different protocols on IDE bus, so they 
> shouldn't 
> affect each other. The IDE core will always tune the best PIO mode for you, 
> so 
> the optimal command timings will be set.

Hmm, that would be a thing I had misunderstood.  I thought
set_pio_mode is not called when the drive was DMA capable.

Thank you for detailed review!

Atsushi Nemoto

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