Re: [PATCH 1/3] mmc: omap_hsmmc: use packet sync'd DMA

[David Vrabel <david.vrabel@csr.com>]

Madhusudhan wrote:
> 
>> -----Original Message-----
>> From: David Vrabel [mailto:david.vrabel@csr.com]
>> Sent: Wednesday, February 10, 2010 5:52 AM
>> To: linux-mmc@vger.kernel.org
>> Cc: David Vrabel; linux-omap@vger.kernel.org; madhu.cr@ti.com
>> Subject: [PATCH 1/3] mmc: omap_hsmmc: use packet sync'd DMA
>>
>> Use packet sync'd DMA in the omap_hsmmc driver to avoid the
>> restriction that transfers must be a multiple of the block size.  This
>> is required for byte-mode transfers to SDIO cards.
>>
> What is the typical scenario here? Is it IO_RW_EXTENDED with block_mode
> turned off? 

This patch isn't necessary.  With byte mode transfers you get a single
sg element and the transfer's block size is set to the length of the
transfer so frame sync mode works fine.

David
-- 
David Vrabel, Senior Software Engineer, Drivers
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