linux-kernel - Re: [PATCH] mmc: card: Skip secure option for MoviNAND.

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Message-ID: <CAKYAXd9h5KG09zMm2gO_0keycfBQ-Pq5-Z+tXYrhfuSc0equLQ@mail.gmail.com>
Date:	Tue, 14 Aug 2012 12:51:39 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	IAN CHEN <ian.cy.chen@...sung.com>
Cc:	cjb@...top.org, adrian.hunter@...el.com, subhashj@...eaurora.org,
	linus.walleij@...aro.org, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org, d.j.shin@...sung.com,
	jongtae22.kim@...sung.com, kyungmin.park@...sung.com,
	jh80.chung@...sung.com
Subject: Re: [PATCH] mmc: card: Skip secure option for MoviNAND.

Hi. Ian.

Okay, I see. plz add this address in changelog.

I also agree about Linus's suggestion.
So Would you change flag name to be neutral ?
We can distinguish samsung movinand by CID_MANFID_SAMSUNG.
And will reuse quirk flag when same issue occurred from other vendor's
mmc deivce.

Thanks.

2012/8/14, IAN CHEN <ian.cy.chen@...sung.com>:
> Dear Mr. Jeon,
>
> This is workaround for some Samsung eMMC, MoviNAND.
> There are known issue about secure erase & secure trim with these eMMC
> device which I listed by product_name.
> Therefore, for these eMMC devices, we just skip
> mmc_blk_issue_secdiscard_rq() and use mmc_blk_issue_discard_rq() instead.
>
> You could refer this discussion in XDA developers.
>     http://forum.xda-developers.com/showthread.php?t=1644364
>
> https://plus.google.com/111398485184813224730/posts/21pTYfTsCkB#111398485184813224730/posts/21pTYfTsCkB
>
> Regards,
> Ian
>
> -----Original Message-----
> From: Namjae Jeon [mailto:linkinjeon@...il.com]
> Sent: Monday, August 13, 2012 10:03 PM
> To: IAN CHEN
> Cc: cjb@...top.org; adrian.hunter@...el.com; subhashj@...eaurora.org;
> linus.walleij@...aro.org; linux-mmc@...r.kernel.org;
> linux-kernel@...r.kernel.org; d.j.shin@...sung.com;
> jongtae22.kim@...sung.com; kyungmin.park@...sung.com;
> jh80.chung@...sung.com
> Subject: Re: [PATCH] mmc: card: Skip secure option for MoviNAND.
>
> Hi. Ian.
>
> known issue ? Would you explain more ?
>
> Thanks.
>
> 2012/8/13 IAN CHEN <ian.cy.chen@...sung.com>:
>> From 5c60eb8be04c7440d6e33b8f72ea2046a3657ac4 Mon Sep 17 00:00:00 2001
>> From: ian.cy.chen <ian.cy.chen@...sung.com>
>> Date: Mon, 13 Aug 2012 10:53:55 +0900
>> Subject: [PATCH] mmc: card: Skip secure option for MoviNAND.
>>
>> For several MoviNAND, there are some known issue with secure option.
>> For these specific MoviNAND device, we skip secure option.
>>
>> Signed-off-by: Ian Chen <ian.cy.chen@...sung.com>
>> ---
>>  drivers/mmc/card/block.c |   24 +++++++++++++++++++++++-
>>  include/linux/mmc/card.h |    1 +
>>  2 files changed, 24 insertions(+), 1 deletions(-)
>>
>
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