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=-5.5 required=3.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 D3FF1C4338F for ; Tue, 3 Aug 2021 10:00:56 +0000 (UTC) Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (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 807FB60F56 for ; Tue, 3 Aug 2021 10:00:56 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 807FB60F56 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kernelnewbies.org Received: from localhost ([::1] helo=shelob.surriel.com) by shelob.surriel.com with esmtp (Exim 4.94.2) (envelope-from ) id 1mAqxO-0000F8-Ja; Tue, 03 Aug 2021 05:43:30 -0400 Received: from mail-lf1-x12b.google.com ([2a00:1450:4864:20::12b]) by shelob.surriel.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.94.2) (envelope-from ) id 1mAqwi-00007i-UM for kernelnewbies@kernelnewbies.org; Tue, 03 Aug 2021 05:42:48 -0400 Received: by mail-lf1-x12b.google.com with SMTP id t9so25748517lfc.6 for ; Tue, 03 Aug 2021 02:42:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=PX3ItuDYlpA9AL0+YPgh33eLuXMdBQgOGz+NFtd4lPY=; b=ZCpvsgtS1LOLH5WNUjJ4+VwA+V5ey2wUkaF2f/HTdtd7xY8aLM0eLGSYSOVlNBntL9 4TP++2rHLPPRnXPeOwrv8pl+Sjj/5+vCako7MG0fxwwUPCzBGJwCAp2uGoasiemXdeEG vav/3DYRzNDYBuyEhULmN2eYBCyitu+1RsKZELztAd1TzXdaJTEqEMlmfAv8PlWZaZcT DHmprFhyvQa5Msw0rdVnPsEHT8XTSiYsi2m559oTFCMp47PymtwNFjHmQGkWshCxO6Uk gj7vGQnm5okb3lLw+z0w8myAS1ICYZ79c1XxJAN/ijhd153n1HMsduuRqJTU6ITuUCVv vK2A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=PX3ItuDYlpA9AL0+YPgh33eLuXMdBQgOGz+NFtd4lPY=; b=D6wC3hcAfKqM4pNp8T+7ivR7uRypTcJcL/kEd0hMeRtC2CIKeZfWD2d91Xjt0j40gF IeD+/a9h8U36b4S1yAg6JJ77VeSX12L0sYj4KLVNRPxAxb0iW+Up9yEtYOckDHgoyaPt 6lWyNPuqRj5edeUJtnoMjvjAthE3aEmacx+OSqqdTNZW9vR47tMDKwM/0DPF2ofT5/Wo ptmTV7F+6B8Qs7N/vPcvOBgg4QNu9G0mKF1+ml0maT7KfWvFTN9AAZxMYzotIxNq71Ja n62JEYxt/rT7QoBpWSJsJR3APhgxz5StkUlE2fhmYO8Wf++z3WWqYaZR/e3atazxIquD 1Pdg== X-Gm-Message-State: AOAM530QUMCGPlV891gtdF2nk4FVgLyxxHVITvcNXNEKdRrViz5WUuLM VA0hRsMNnnut+MAKxivWKmeBo+wrbVPdIR24EO4dj51s+BFNMs+I X-Google-Smtp-Source: ABdhPJyV3m6R3TewQEfH3clKBnVxuQvBqxLN+uSMSaDNGCqd4L+f3yaRHUrkWl6vRdKiSI3rYKRBDxao2RDw4JTJbc0= X-Received: by 2002:a19:ac4c:: with SMTP id r12mr14379174lfc.217.1627983764937; Tue, 03 Aug 2021 02:42:44 -0700 (PDT) MIME-Version: 1.0 From: Ivan Riabtsov Date: Tue, 3 Aug 2021 12:42:34 +0300 Message-ID: Subject: nand flash disable ecc To: kernelnewbies@kernelnewbies.org X-BeenThere: kernelnewbies@kernelnewbies.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kernelnewbies-bounces@kernelnewbies.org Hello. Please tell me how to disable ecc checking in nand memory? I only found this: https://www.kernel.org/doc/html/v4.14/driver-api/mtdnand.html#ecc-selection-constants but didn't figure out how to disable ecc checking. What i did: diff -Naur linux-5.10.50_orig/drivers/mtd/nand/raw/nand_base.c linux-5.10.50/drivers/mtd/nand/raw/nand_base.c --- linux-5.10.50_orig/drivers/mtd/nand/raw/nand_base.c 2021-07-14 17:56:55.000000000 +0300 +++ linux-5.10.50/drivers/mtd/nand/raw/nand_base.c 2021-08-03 11:20:41.566988751 +0300 @@ -43,6 +43,7 @@ #include #include #include +#include #include "internals.h" @@ -4902,9 +4903,12 @@ int err; err = of_property_read_string(np, "nand-ecc-mode", &pm); ####### at this point the checkout is turned off, as I assume. Since the debug message in the kernel appears exactly in this place + pr_emerg("!!!!!!!!!!!!err is %d, prop is: %s\n", err, pm); if (err) - return NAND_ECC_ENGINE_TYPE_INVALID; + return NAND_ECC_ENGINE_TYPE_NONE; + /*return NAND_ECC_ENGINE_TYPE_INVALID;*/ + printk(KERN_EMERG "!!!!!!!!!prop is: %s\n", pm); for (eng_type = NAND_ECC_NONE; eng_type < ARRAY_SIZE(nand_ecc_legacy_modes); eng_type++) { if (!strcasecmp(pm, nand_ecc_legacy_modes[eng_type])) { but it doesn't work. Please, tell me, how i can disable ecc checking? _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies