From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755298Ab2HNCIx (ORCPT ); Mon, 13 Aug 2012 22:08:53 -0400 Received: from mailout1.samsung.com ([203.254.224.24]:32514 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754820Ab2HNCIu convert rfc822-to-8bit (ORCPT ); Mon, 13 Aug 2012 22:08:50 -0400 X-AuditID: cbfee61a-b7fc66d0000043b7-2e-5029b3312d4a From: IAN CHEN To: "'Namjae Jeon'" 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 References: <5028CDED.2020307@samsung.com> In-reply-to: Subject: RE: [PATCH] mmc: card: Skip secure option for MoviNAND. Date: Tue, 14 Aug 2012 11:10:04 +0900 Message-id: <000101cd79c1$ebf01040$c3d030c0$%cy.chen@samsung.com> MIME-version: 1.0 Content-type: text/plain; charset=UTF-8 Content-transfer-encoding: 8BIT X-Mailer: Microsoft Office Outlook 12.0 Thread-index: Ac15U/X/RN2xdH42R6eCpMthNpQDNQAbd72w Content-language: en-us X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrELMWRmVeSWpSXmKPExsVy+t9jQV3DzZoBBvcuiltc3jWHzeLI/35G ByaPz5vkAhijuGxSUnMyy1KL9O0SuDJ2XWpiLTjCW/Fx/lL2BsYt3F2MnBwSAiYSHx9eYYWw xSQu3FvP1sXIxSEkMJ1R4unmfmYI5y+jxI3v/WwgVWwCGhLfDz5hBLFFgOwH27eygxQxCzQy SWzumM8MkhASKJRY8WczmM0pECxxZM4nsGZhAQeJjy1TgdZxcLAIqErs+20DEuYVcJTY9ewZ G4QtKPFj8j0WEJtZQF1i0rxFzBC2tsSTdxfAWiWA4o/+6kKcYCRx7NcBqHJxiUkPHrJPYBSa hWTSLCSTZiGZNAtJywJGllWMoqkFyQXFSem5hnrFibnFpXnpesn5uZsYwSH9TGoH48oGi0OM AhyMSjy8CmmaAUKsiWXFlbmHGCU4mJVEeO/3AIV4UxIrq1KL8uOLSnNSiw8xSnOwKInzGnt/ 9RcSSE8sSc1OTS1ILYLJMnFwSjUwds74Xid8zzxD6dWFBd1qaitzI34zrBOw0RbNe6dcUbPo 4maODd5sNuHdGtYzLMVYd0r/5v0ku9HxhPq/Bq6D5a/KTXw92GSkv7/cuFMpZdVmi7mn7SQE dqc1neZJ/fR785Vl/sbHmWct2pO6/cnm0AWX03Uy+c56h83WnHK29rS78YU5WclOSizFGYmG WsxFxYkAoqhhUWUCAAA= X-TM-AS-MML: No Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 : > From 5c60eb8be04c7440d6e33b8f72ea2046a3657ac4 Mon Sep 17 00:00:00 2001 > From: ian.cy.chen > 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 > --- > drivers/mmc/card/block.c | 24 +++++++++++++++++++++++- > include/linux/mmc/card.h | 1 + > 2 files changed, 24 insertions(+), 1 deletions(-) >