linux-kernel - Re: [patch 2/2] sata_via: Delay on vt6420 when starting ATAPI DMA write

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Message-ID: <4B56A8A0.3050309@gmail.com>
Date:	Wed, 20 Jan 2010 15:54:24 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Bart Hartgers <bart.hartgers@...il.com>
CC:	Robert Hancock <hancockrwd@...il.com>,
	linux-kernel@...r.kernel.org, Jeff Garzik <jgarzik@...ox.com>,
	linux-ide@...r.kernel.org, juergen.metzdorf@...elev-dsl.de,
	markpschool@...mail.com, sporadic.crash@...il.com, apopov@...ma.bg,
	david@...mber.co.za, jay4mail@...il.com
Subject: Re: [patch 2/2] sata_via: Delay on vt6420 when starting ATAPI DMA
 	write

Hello,

On 01/20/2010 03:33 PM, Bart Hartgers wrote:
> Well, the ata_sff_pause actually does a ndelay(400), and with today's
> processors that would be a 'slow path', right?

unlikely() is used to mark very unlikely paths not the slow ones and I
don't really think DMA_TO_DEVICE would qualify as an unlikely path.

Thanks.

-- 
tejun
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