From patchwork Thu Apr 2 06:12:33 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Wu X-Patchwork-Id: 6144461 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 623B6BF4A6 for ; Thu, 2 Apr 2015 06:13:48 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9BF4E202EC for ; Thu, 2 Apr 2015 06:13:47 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7ACE4202E6 for ; Thu, 2 Apr 2015 06:13:46 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YdYL6-0000kE-HP; Thu, 02 Apr 2015 06:10:52 +0000 Received: from nasmtp01.atmel.com ([192.199.1.245] helo=DVREDG01.corp.atmel.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YdYKl-0008Nw-BX; Thu, 02 Apr 2015 06:10:32 +0000 Received: from apsmtp01.atmel.com (10.168.254.30) by DVREDG01.corp.atmel.com (10.42.103.30) with Microsoft SMTP Server (TLS) id 14.2.347.0; Thu, 2 Apr 2015 00:10:03 -0600 Received: from melon.corp.atmel.com (10.168.254.13) by apsmtp01.corp.atmel.com (10.168.254.30) with Microsoft SMTP Server id 14.2.347.0; Thu, 2 Apr 2015 14:10:15 +0800 From: Josh Wu To: , Brian Norris Subject: [PATCH] mtd: atmel_nand: add a definition for the oob reserved bytes Date: Thu, 2 Apr 2015 14:12:33 +0800 Message-ID: <1427955153-8851-1-git-send-email-josh.wu@atmel.com> X-Mailer: git-send-email 1.9.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150401_231031_495853_FE47E11F X-CRM114-Status: GOOD ( 10.24 ) X-Spam-Score: -2.3 (--) Cc: Josh Wu , Nicolas Ferre , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP It's better to use a macro instead of just a number. Signed-off-by: Josh Wu --- drivers/mtd/nand/atmel_nand.c | 5 +++-- drivers/mtd/nand/atmel_nand_ecc.h | 3 +++ 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index feaac90..0361c19 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -485,7 +485,7 @@ static void pmecc_config_ecc_layout(struct nand_ecclayout *layout, for (i = 0; i < ecc_len; i++) layout->eccpos[i] = oobsize - ecc_len + i; - layout->oobfree[0].offset = 2; + layout->oobfree[0].offset = PMECC_OOB_RESERVED_BYTES; layout->oobfree[0].length = oobsize - ecc_len - layout->oobfree[0].offset; } @@ -1254,7 +1254,8 @@ static int atmel_pmecc_nand_init_params(struct platform_device *pdev, nand_chip->ecc.steps = mtd->writesize / sector_size; nand_chip->ecc.total = nand_chip->ecc.bytes * nand_chip->ecc.steps; - if (nand_chip->ecc.total > mtd->oobsize - 2) { + if (nand_chip->ecc.total > + mtd->oobsize - PMECC_OOB_RESERVED_BYTES) { dev_err(host->dev, "No room for ECC bytes\n"); err_no = -EINVAL; goto err; diff --git a/drivers/mtd/nand/atmel_nand_ecc.h b/drivers/mtd/nand/atmel_nand_ecc.h index d4035e3..668e735 100644 --- a/drivers/mtd/nand/atmel_nand_ecc.h +++ b/drivers/mtd/nand/atmel_nand_ecc.h @@ -152,4 +152,7 @@ /* Time out value for reading PMECC status register */ #define PMECC_MAX_TIMEOUT_MS 100 +/* Reserved bytes in oob area */ +#define PMECC_OOB_RESERVED_BYTES 2 + #endif