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=-20.2 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=unavailable 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 9DC50C43217 for ; Mon, 20 Sep 2021 17:09:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 873FE61875 for ; Mon, 20 Sep 2021 17:09:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245300AbhITRLG (ORCPT ); Mon, 20 Sep 2021 13:11:06 -0400 Received: from mail.kernel.org ([198.145.29.99]:33714 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345123AbhITRI6 (ORCPT ); Mon, 20 Sep 2021 13:08:58 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 07CD5617E1; Mon, 20 Sep 2021 16:56:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1632156963; bh=h4cabG8quT9jWEbXmVwOnnbV2rmN1SuRwXr0QGdj65A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=l/I6bV9rIK+PDLeFCnFCQMlQAiwklW1mOaiCBho5jkSO7yXte4Raeq20FN/M/1l8t EfbZOt8nE4jX8EI5KnGhzV0etppDJEzrh9sBSrqEXuf2f6YDC4MyzOhGsx6zvQyUXz d+0aqiO6R6G53Y9XfRaXV8JvbiBIdhx9pV7P5vAM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Ryan J. Barnett" , Miquel Raynal , Rob Herring , Sasha Levin Subject: [PATCH 4.9 166/175] dt-bindings: mtd: gpmc: Fix the ECC bytes vs. OOB bytes equation Date: Mon, 20 Sep 2021 18:43:35 +0200 Message-Id: <20210920163923.494463918@linuxfoundation.org> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210920163918.068823680@linuxfoundation.org> References: <20210920163918.068823680@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Miquel Raynal [ Upstream commit 778cb8e39f6ec252be50fc3850d66f3dcbd5dd5a ] "PAGESIZE / 512" is the number of ECC chunks. "ECC_BYTES" is the number of bytes needed to store a single ECC code. "2" is the space reserved by the bad block marker. "2 + (PAGESIZE / 512) * ECC_BYTES" should of course be lower or equal than the total number of OOB bytes, otherwise it won't fit. Fix the equation by substituting s/>=/<=/. Suggested-by: Ryan J. Barnett Signed-off-by: Miquel Raynal Acked-by: Rob Herring Link: https://lore.kernel.org/linux-mtd/20210610143945.3504781-1-miquel.raynal@bootlin.com Signed-off-by: Sasha Levin --- Documentation/devicetree/bindings/mtd/gpmc-nand.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt index 174f68c26c1b..34981b98d807 100644 --- a/Documentation/devicetree/bindings/mtd/gpmc-nand.txt +++ b/Documentation/devicetree/bindings/mtd/gpmc-nand.txt @@ -123,7 +123,7 @@ on various other factors also like; so the device should have enough free bytes available its OOB/Spare area to accommodate ECC for entire page. In general following expression helps in determining if given device can accommodate ECC syndrome: - "2 + (PAGESIZE / 512) * ECC_BYTES" >= OOBSIZE" + "2 + (PAGESIZE / 512) * ECC_BYTES" <= OOBSIZE" where OOBSIZE number of bytes in OOB/spare area PAGESIZE number of bytes in main-area of device page -- 2.30.2