From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-2592411-1520409598-2-5111916643504179817 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='CN', FromHeader='at', MailFrom='org' X-Spam-charsets: plain='iso-8859-1' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1520409598; b=C+U/9dDdtFd6/VAHaQjlIvREpGnD8AQ2b6Y+TRX63qgv3b4 QzLNHs9+94DEkrxNRBJo6ZiMkucTZat76O+Uodko1glK3zBqdLNdBcNXuC4E7T+q vvifOndr0ugSNq3QQLaSpunyErrVK76ukRAZjG4Yqx/ed49vRrlFFuSFTCAeKhY7 +S+Aq2Mrec5tKxLtGMPAW4V8df970SvFK2o+gVE/IaKw6Py+nmilpQ8zX+L5wIb8 kq5lQaKhPWmNEvXj7zRWIvv7VSd+ayhWIQOB26QmwAKaZWUpWvB6l8IeQg4A3b7r BA1KaTttt7j4m8/5L2hUAdSx8/xN4QtiUA9n4Ww== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding :content-type:sender:list-id; s=arctest; t=1520409598; bh=vmsdb4 2urj6hYNhSin1s6Wt3790a6EoR5DN1PuY02Vw=; b=H+jEMfL3dDJd0pFdc7bE6u HFsvNjV9XVsitWNmUM0xTPwuX/04IYxaZVpT2WVL2Pqj/WlAPHVNgWBRbGHFwEgf fMUzjnZNzL/SFzV2csO2twfwONrFvJovBf+3Isx3iAfI5ogGInLVUHLcL9yrpBUH DRTbIGVx8uTzAJbLAmbnuUErcnloSNv7dP0wsPmzYzNYHIbFexPex3zIxsC4Oxpg TU0xDwV+3sHliMrJ2pyNbVtzmf5RrQiakBM7YjN3z1xlvzlz2a+kNf12PWvugjdy YKzMVqjyhg2l8HI0GnbqWeMQRXsX41xqHZhDkmNtGpISWPUTu184BKqWoAOGojxQ == ARC-Authentication-Results: i=1; mx2.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=nod.at; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-category=clean score=-100 state=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=nod.at header.result=pass header_is_org_domain=yes Authentication-Results: mx2.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=nod.at; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-category=clean score=-100 state=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=nod.at header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751090AbeCGH7z convert rfc822-to-8bit (ORCPT ); Wed, 7 Mar 2018 02:59:55 -0500 Received: from lilium.sigma-star.at ([109.75.188.150]:35272 "EHLO lilium.sigma-star.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751029AbeCGH7z (ORCPT ); Wed, 7 Mar 2018 02:59:55 -0500 From: Richard Weinberger To: Pavel Machek Cc: linux-mtd@lists.infradead.org, linux-kernel@vger.kernel.org, cyrille.pitchen@wedev4u.fr, marek.vasut@gmail.com, boris.brezillon@free-electrons.com, computersforpeace@gmail.com, dwmw2@infradead.org, dedekind1@gmail.com, tharvey@gateworks.com, stable@vger.kernel.org Subject: Re: [PATCH] ubi: Reject MLC NAND Date: Wed, 07 Mar 2018 09:01:16 +0100 Message-ID: <6772577.AmT7QaWTNU@blindfold> In-Reply-To: <20180306231805.GA28183@amd> References: <20180303104554.5958-1-richard@nod.at> <20180306231805.GA28183@amd> MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="iso-8859-1" Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Pavel, Am Mittwoch, 7. März 2018, 00:18:05 CET schrieb Pavel Machek: > On Sat 2018-03-03 11:45:54, Richard Weinberger wrote: > > While UBI and UBIFS seem to work at first sight with MLC NAND, you will > > most likely lose all your data upon a power-cut or due to read/write > > disturb. > > In order to protect users from bad surprises, refuse to attach to MLC > > NAND. > > > > Cc: stable@vger.kernel.org > > That sounds like _really_ bad idea for stable. All it does is it > removes support for hardware that somehow works. MLC is not supported and does not work. Full stop. If someone manages to get it somehow work, either with hardware or software hacks they are on their own. Having it in stable is the only chance we have to get it into vendor kernels. All this patch does is representing the current state of UBI/UBIFS. In the last months I got a way too much boards with MLC NAND on my desk where UBIFS broke. Customers wished they had known before... Thanks, //richard