From mboxrd@z Thu Jan 1 00:00:00 1970 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=0.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,URIBL_DBL_ABUSE_MALW,USER_AGENT_SANE_2 autolearn=no 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 C29ABC35247 for ; Wed, 5 Feb 2020 20:23:37 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 949C120730 for ; Wed, 5 Feb 2020 20:23:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="RDYWuiEA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 949C120730 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=collabora.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=6ijExsVkBKE6p4XPSIgKx3Lia7pt21CJ2rq0wkHgAJQ=; b=RDYWuiEAkCQ41S UFsjJ5l1ox5FR15H7VP7VButouCruEPvyR1fo0YIFzASY4pji+O2QifBSfD/ixG61bhj+OTXEE7RY CSXeuD2QXs5qQV2ykfu6tkJbLoAzCj7tLqdMSiYUSQn9DPXWoaMsPV937Y2AfJzc7+HcA4HXJoLKL Zf5lAoP9mY+XuGSju8zaWfHQG/Gkbfc8qSwYw3QDrPEbc3NwZAFdsYtELyFDUWrfNu+MODeSkljzs zNXwB2GFBxr4MWOs/OhgBDYZWQUv6XlCZC7DP0OkkZCwSMzhkk5A9rY8wxcrj1uzKTMKWHqC+yMZe 9dHcqsGHjNHSdfnGVubA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1izRCd-00025E-2z; Wed, 05 Feb 2020 20:23:15 +0000 Received: from bhuna.collabora.co.uk ([46.235.227.227]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1izRCZ-00024t-3Y for linux-mtd@lists.infradead.org; Wed, 05 Feb 2020 20:23:12 +0000 Received: from localhost (unknown [IPv6:2a01:e0a:2c:6930:b93f:9fae:b276:a89a]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: bbrezillon) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id A60F12912B6; Wed, 5 Feb 2020 20:23:04 +0000 (GMT) Date: Wed, 5 Feb 2020 21:23:01 +0100 From: Boris Brezillon To: JH Subject: Re: mtd_nandbiterrs errors Message-ID: <20200205212301.1e26c263@collabora.com> In-Reply-To: References: Organization: Collabora X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200205_122311_279552_F4FC0C94 X-CRM114-Status: UNSURE ( 7.45 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mtd Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org On Wed, 5 Feb 2020 22:28:50 +1100 JH wrote: > Resolved, using kernel test probably a bad idea, change to use > mtd-utils nandbiterrs resolved issue. I doubt it solved the real problem: ECC is not working properly. > > [ 695.257984] mtd_nandbiterrs: Inserted biterror @ 0/0 > > [ 695.262984] mtd_nandbiterrs: rewrite page > > [ 695.273646] mtd_nandbiterrs: read_page > > [ 695.280000] mtd_nandbiterrs: Read reported 2 corrected bit errors The ECC engine should report an uncorrectable error here, not 2 corrected bits. BTW, an ECC of 2bits/512bytes sounds weak for a 2k-page NAND. What's the NAND part you're testing with? ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/