From patchwork Mon Sep 3 13:00:02 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akinobu Mita X-Patchwork-Id: 181359 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from merlin.infradead.org (unknown [IPv6:2001:4978:20e::2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 83D0E2C007C for ; Mon, 3 Sep 2012 23:02:07 +1000 (EST) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1T8WHQ-0007hi-Oq; Mon, 03 Sep 2012 13:01:28 +0000 Received: from mail-pb0-f49.google.com ([209.85.160.49]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1T8WGW-0007DY-Ss for linux-mtd@lists.infradead.org; Mon, 03 Sep 2012 13:00:34 +0000 Received: by mail-pb0-f49.google.com with SMTP id rq8so8483394pbb.36 for ; Mon, 03 Sep 2012 06:00:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:x-mailer:in-reply-to:references; bh=rB1B7iVs35L7wqwvHeU7fiLMRwnvUVdp2Fz1nKPqpUQ=; b=nQ7frFDC13XNy8zdCZuAA8mbGjaAtk8XBbc+zC+l0V5Fq3D0g91+FFS+ZxzWb3BciP D4FMy6Ez+zQmOYF86B/wdU9pQaaGuyEk1DaFlH8z1AcuJN0v9pMrD4WNTEkPCiAHBTCp ilsnE7RaoDJfF+q+0qSfXDeq8pcjyM7aKvB58vf1yDmE9XqZuOcXPo6YuukIFSrXLrlb dG2pOyk8pueDwW5IhhwQ78ELKUTDSdh33VQeoFL7U3gAJFAXOkQffd2+d2lJHere+ZMk gJYWbKYpc8kuHGqweKvIwSA5z84Vt8dEBVsglcmK0C8vjsjdu5NfxcrMW2yhpJ7nzA8D cn/A== Received: by 10.66.85.4 with SMTP id d4mr33998142paz.11.1346677232629; Mon, 03 Sep 2012 06:00:32 -0700 (PDT) Received: from localhost.localdomain (p4038-ipngn701hodogaya.kanagawa.ocn.ne.jp. [114.158.195.38]) by mx.google.com with ESMTPS id uu6sm9884078pbc.70.2012.09.03.06.00.31 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 03 Sep 2012 06:00:32 -0700 (PDT) From: Akinobu Mita To: linux-mtd@lists.infradead.org Subject: [PATCH v3 07/11] mtd: mtd_nandecctest: generalize injecting bit errors function for ecc code Date: Mon, 3 Sep 2012 22:00:02 +0900 Message-Id: <1346677206-13621-8-git-send-email-akinobu.mita@gmail.com> X-Mailer: git-send-email 1.7.11.4 In-Reply-To: <1346677206-13621-1-git-send-email-akinobu.mita@gmail.com> References: <1346677206-13621-1-git-send-email-akinobu.mita@gmail.com> X-Spam-Note: CRM114 invocation failed X-Spam-Score: -2.7 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.7 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [209.85.160.49 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (akinobu.mita[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature Cc: Artem Bityutskiy , David Woodhouse , Akinobu Mita X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: linux-mtd-bounces@lists.infradead.org Errors-To: linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org In order to inject deliberate bit errors into the ecc code which only has 3 bytes, this adjusts the bitops usage in inject_single_bit_error() which is currently only used for injecting into the 256 or 512 bytes data block. Signed-off-by: Akinobu Mita Cc: David Woodhouse Cc: linux-mtd@lists.infradead.org Cc: Artem Bityutskiy --- drivers/mtd/tests/mtd_nandecctest.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/tests/mtd_nandecctest.c b/drivers/mtd/tests/mtd_nandecctest.c index d3e8873..0274f73 100644 --- a/drivers/mtd/tests/mtd_nandecctest.c +++ b/drivers/mtd/tests/mtd_nandecctest.c @@ -7,13 +7,22 @@ #include #include +#include + #if defined(CONFIG_MTD_NAND) || defined(CONFIG_MTD_NAND_MODULE) +#ifdef __LITTLE_ENDIAN +#define __change_bit_le(nr, addr) __change_bit(nr, addr) +#else +#define __change_bit_le(nr, addr) \ + __change_bit((nr) ^ ((BITS_PER_LONG - 1) & ~0x7), addr) +#endif + static void inject_single_bit_error(void *data, size_t size) { - unsigned long offset = random32() % (size * BITS_PER_BYTE); + unsigned int offset = random32() % (size * BITS_PER_BYTE); - __change_bit(offset, data); + __change_bit_le(offset, data); } static void dump_data_ecc(void *error_data, void *error_ecc, void *correct_data,