* bounce_sg and sg in mmc_queue
@ 2011-09-21 18:26 J Freyensee
2011-09-22 16:35 ` J Freyensee
0 siblings, 1 reply; 2+ messages in thread
From: J Freyensee @ 2011-09-21 18:26 UTC (permalink / raw)
To: linux-mmc
Hello:
Could anyone tell me in struct mmc_queue, what is the difference between
'struct scatterlist *bounce_sg' and 'struct scatterlist *sg' is?
I see 'bounce_sg' get used to copy data from/to the buffer upon a host
read/write operation so I assume 'bounce_sg' points to the most recent
data from a host controller read/write operation.
Thanks for the help.
--
J (James/Jay) Freyensee
Storage Technology Group
Intel Corporation
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: bounce_sg and sg in mmc_queue
2011-09-21 18:26 bounce_sg and sg in mmc_queue J Freyensee
@ 2011-09-22 16:35 ` J Freyensee
0 siblings, 0 replies; 2+ messages in thread
From: J Freyensee @ 2011-09-22 16:35 UTC (permalink / raw)
To: linux-mmc
On 09/21/2011 11:26 AM, J Freyensee wrote:
> Hello:
>
> Could anyone tell me in struct mmc_queue, what is the difference between
> 'struct scatterlist *bounce_sg' and 'struct scatterlist *sg' is?
>
> I see 'bounce_sg' get used to copy data from/to the buffer upon a host
> read/write operation so I assume 'bounce_sg' points to the most recent
> data from a host controller read/write operation.
>
If someone actually knows this, I will send up a patch documenting this
in the code. I think some of the mmc code could use a little
documentation??
> Thanks for the help.
>
--
J (James/Jay) Freyensee
Storage Technology Group
Intel Corporation
^ permalink raw reply [flat|nested] 2+ messages in thread
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