linux-kernel - Re: DMA mapping on SCSI device?

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Message-ID: <47A0AD4A.20109@rtr.ca>
Date:	Wed, 30 Jan 2008 12:00:58 -0500
From:	Mark Lord <liml@....ca>
To:	Robert Hancock <hancockr@...w.ca>
Cc:	ltuikov@...oo.com, linux-arch@...r.kernel.org,
	ide <linux-ide@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-scsi@...r.kernel.org
Subject: Re: DMA mapping on SCSI device?

Mark Lord wrote:
> ..
> Commands which were not ADMA compatible (eg. MODE_SENSE, 
> TEST_UNIT_READY, ..)
> were simply handled with PIO (in the driver) rather than any form of DMA,
> which is okay because those commands are relatively infrequent.
..

A slight correction there:  TEST_UNIT_READY was fine in ADMA mode as well.

Cheers
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