linux-kernel - Re: [PATCH v8 2/2] mmc: card: Adding support for sanitize in eMMC 4.5

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Date:	Thu, 26 Jul 2012 13:27:49 +0000
From:	Arnd Bergmann <arnd@...db.de>
To:	Yaniv Gardi <ygardi@...eaurora.org>
Cc:	linux-mmc@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 2/2] mmc: card: Adding support for sanitize in eMMC 4.5

On Wednesday 25 July 2012, Yaniv Gardi wrote:
> This feature delete the unmap memory region of the eMMC card,
> by writing to a specific register in the EXT_CSD
> unmap region is the memory region that were previously deleted
> (by erase, trim or discard operation)
> 
> Signed-off-by: Yaniv Gardi <ygardi@...eaurora.org>

This looks like it will only work for eMMC-4.5 but not for SD-3.01, which
offers the same funcitonality in the form of the "start recording" option
to CMD20. Is there any reason why you would want to implement one but
not the other?

	Arnd

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