From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeff Garzik <jgarzik@pobox.com>
Subject: Re: [patch 08/15] libata: Add ability to prevent PRD from being allocated
Date: Thu, 09 Feb 2006 04:22:10 -0500
Message-ID: <43EB09C2.6080000@pobox.com>
References: <200602061542.k16FgXXX015889@d03av03.boulder.ibm.com> <43E9D236.2080207@gmail.com>
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To: Tejun Heo <htejun@gmail.com>
Cc: brking@us.ibm.com, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org
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Tejun Heo wrote:
> Hello, Brian.
> 
> brking@us.ibm.com wrote:
> 
>>For some HBAs, particularly SAS HBAs, there is no reason to
>>allocate a PRD buffer, since it is not used. Add a flag
>>to prevent its allocation.
>>
> 
> 
> I think it's better done with ata_sas_port_start/stop rather than with
> ATA_FLAG_NO_PRD.  All sata low level drivers which don't use PRD table
> implement their own port_start/stop (ahci.c, sata_sil24.c for example).

Good point.

	Jeff