From patchwork Wed May 12 14:43:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 438038 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 00410C43611 for ; Wed, 12 May 2021 16:41:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BCCD161040 for ; Wed, 12 May 2021 16:41:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237482AbhELQiu (ORCPT ); Wed, 12 May 2021 12:38:50 -0400 Received: from mail.kernel.org ([198.145.29.99]:47150 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238412AbhELQaT (ORCPT ); Wed, 12 May 2021 12:30:19 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 757E7613C5; Wed, 12 May 2021 15:57:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620835035; bh=O8AkEc7Xps/dZTeO7uBNoyzMIcXrglmC010TCSsG1kI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FidGqYZWwkYMv25QY9fmkO70KQHvAu7ri7HuSghGbf5i8SJsYMqqdtICElUKJICe4 dBnDvkYoXItf1skJhxtDqWO47u8botHcLPYtqM2F7dT0u216xX9o8mhDP5EvPYNKiS 20UyN1NLofcHY7LHKxPSkBpRY3uGWHPSnoWMJOYo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?utf-8?q?=C3=81lvaro_Fern=C3=A1ndez_Rojas?= , Brian Norris , Miquel Raynal , Sasha Levin Subject: [PATCH 5.12 181/677] mtd: rawnand: brcmnand: fix OOB R/W with Hamming ECC Date: Wed, 12 May 2021 16:43:47 +0200 Message-Id: <20210512144843.253919346@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144837.204217980@linuxfoundation.org> References: <20210512144837.204217980@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Álvaro Fernández Rojas [ Upstream commit f5200c14242fb8fa4a9b93f7fd4064d237e58785 ] Hamming ECC doesn't cover the OOB data, so reading or writing OOB shall always be done without ECC enabled. This is a problem when adding JFFS2 cleanmarkers to erased blocks. If JFFS2 clenmarkers are added to the OOB with ECC enabled, OOB bytes will be changed from ff ff ff to 00 00 00, reporting incorrect ECC errors. Fixes: 27c5b17cd1b1 ("mtd: nand: add NAND driver "library" for Broadcom STB NAND controller") Signed-off-by: Álvaro Fernández Rojas Acked-by: Brian Norris Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20210224080210.23686-1-noltari@gmail.com Signed-off-by: Sasha Levin --- drivers/mtd/nand/raw/brcmnand/brcmnand.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/raw/brcmnand/brcmnand.c index 659eaa6f0980..5ff4291380c5 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -2688,6 +2688,12 @@ static int brcmnand_attach_chip(struct nand_chip *chip) ret = brcmstb_choose_ecc_layout(host); + /* If OOB is written with ECC enabled it will cause ECC errors */ + if (is_hamming_ecc(host->ctrl, &host->hwcfg)) { + chip->ecc.write_oob = brcmnand_write_oob_raw; + chip->ecc.read_oob = brcmnand_read_oob_raw; + } + return ret; }