linux-kernel - Re: [PATCH] libata: don't initialize sg in ata_exec_internal() if DMA

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Date:	Mon, 11 Dec 2006 09:33:51 -0500
From:	Jeff Garzik <jgarzik@...ox.com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	linuxppc-dev@...abs.org, Tejun Heo <htejun@...il.com>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] libata: don't initialize sg in ata_exec_internal() if
 DMA_NONE

Arnd Bergmann wrote:
> On Monday 11 December 2006 15:02, Tejun Heo wrote:
>>  {
>>         struct scatterlist sg;
>> +       unsigned int n_elem = 0;
>>  
>> -       sg_init_one(&sg, buf, buflen);
>> +       if (dma_dir != DMA_NONE) {
>> +               WARN_ON(!buf);
>> +               sg_init_one(&sg, buf, buflen);
>> +               n_elem++;
>> +       }
>>  
> Ok, looks good as well. I still think we should have the WARN_ON()
> in sg_set_buf(), but I can send a separate patch for that to linux-mm.

Please CC me and linux-ide on all libata patches (certainly akpm as 
well).  Andrew picks up most of the libata changes automatically via git 
from my libata-dev.git#ALL.

	Jeff



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