Re: [PATCH 1/3] mmc: core: activate pre-erased multiple write support for sd card

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On Thu, Oct 26, 2017 at 12:46:02PM +0200, Ulf Hansson wrote:
> On 26 October 2017 at 03:19, Shawn Lin <shawn.lin@xxxxxxxxxxxxxx> wrote:
> > Hi, Ulf
> >
> > On 2017/9/27 11:40, Shawn Lin wrote:
> >>
> >> Per SD specification version 4.10, section 4.3.4, it says "pre-erased
> >> (ACMD23) will make a following Multiple Block Write operation faster
> >> compared to the same operation without preceding ACMD23". ACMD23 is
> >> mandatory for all sd cards and the spec also says "Command STOP_TRAN
> >> (CMD12) shall be used to stop the transmission in Write Multiple Block
> >> whether or not the preerase (ACMD23) feature is used."
> >
> >
> > Ping... :)
> 
> Hi Shawn,
> 
> Actually I was waiting for confirmation from Jan about his tests.

The patches worked for me but I'm not sure I've actually tested ACMD23.
Do I need to trigger ACMD23 somehow?

--Jan

> However, overall the series looks reasonable to me.
> 
> Kind regards
> Uffe
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