From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chris Ball Subject: Re: [PATCH] mmc: core: Fix the incorrect calculation for erase unit size. Date: Tue, 13 Sep 2011 22:29:52 -0400 Message-ID: References: <1315461565-16009-1-git-send-email-tgih.jun@samsung.com> <002f01cc7285$d80dc660$88295320$%jun@samsung.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from void.printf.net ([89.145.121.20]:59975 "EHLO void.printf.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753681Ab1INCaC (ORCPT ); Tue, 13 Sep 2011 22:30:02 -0400 In-Reply-To: <002f01cc7285$d80dc660$88295320$%jun@samsung.com> (Seungwon Jeon's message of "Wed, 14 Sep 2011 11:27:26 +0900") Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Seungwon Jeon Cc: linux-mmc@vger.kernel.org, linux-samsung-soc@vger.kernel.org, kgene.kim@samsung.com, dh.han@samsung.com Hi, On Tue, Sep 13 2011, Seungwon Jeon wrote: >> On Thu, Sep 08 2011, Seungwon Jeon wrote: >> > Erase unit size of high capacity is multiple of 512KiB not 1024KiB. >> >> Could we have some more info, please? What are the visible symptoms >> of the erase unit size being incorrect, how did you realize this was >> a problem, should this patch be applied to stable@, etc. > > It is mentioned from eMMC Spec. > Erase unit size is defined in 512Kbyte * HC_ERASE_GRP_SIZE(EXT_CSD[224]). You haven't answered any of the other questions I asked, though. Thanks, - Chris. -- Chris Ball One Laptop Per Child