Messages in this thread | | | From | IAN CHEN <> | Subject | RE: [PATCH] mmc: card: Skip secure option for MoviNAND. | Date | Tue, 14 Aug 2012 11:12:47 +0900 |
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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@gmail.com] Sent: Monday, August 13, 2012 10:03 PM To: IAN CHEN Cc: cjb@laptop.org; adrian.hunter@intel.com; subhashj@codeaurora.org; linus.walleij@linaro.org; linux-mmc@vger.kernel.org; linux-kernel@vger.kernel.org; d.j.shin@samsung.com; jongtae22.kim@samsung.com; kyungmin.park@samsung.com; jh80.chung@samsung.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@samsung.com>: > From 5c60eb8be04c7440d6e33b8f72ea2046a3657ac4 Mon Sep 17 00:00:00 2001 > From: ian.cy.chen <ian.cy.chen@samsung.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@samsung.com> > --- > drivers/mmc/card/block.c | 24 +++++++++++++++++++++++- > include/linux/mmc/card.h | 1 + > 2 files changed, 24 insertions(+), 1 deletions(-) >
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