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=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham 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 E5F54C43381 for ; Sat, 30 Mar 2019 18:30:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB8032082C for ; Sat, 30 Mar 2019 18:30:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="LCYpiYSG" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731043AbfC3SaN (ORCPT ); Sat, 30 Mar 2019 14:30:13 -0400 Received: from mail-lj1-f193.google.com ([209.85.208.193]:40516 "EHLO mail-lj1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730675AbfC3SaM (ORCPT ); Sat, 30 Mar 2019 14:30:12 -0400 Received: by mail-lj1-f193.google.com with SMTP id q66so4662132ljq.7 for ; Sat, 30 Mar 2019 11:30:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=Vo7WP4LmAWMjcqmOIdpRol4bf0P8ZM1Pto+rf6Pgo44=; b=LCYpiYSGtObHkRWUY+CU7vylwz1O7Ip7Y+oFokxJ5O1yC7dW7cAfaMovPjvmaqAbFr XfQN4NK/rkuXYDq3RHhdTifIFIwoUiEkL9Ax58rEfCXEZCazCLmW/yz1EH9LYikg1bjH x+ysSsUXtjno18ceoYH9Q9NYgfiB58VmYV0co03sUcGAmMSDHYGfcm7E8dmsTrL3ct3G ohGZv2HN6OuNGawqHKmUBViXvh5HWHrBc6xpkSdDfxqbiygJYjq/ngYV/HrLktcn40Sw Xz3hvAwVl7I50mkHzjrInTmvP4iUOHU18IVbk84ALBTO/IpAkE1bgAGr+L59CECFi59N xBAQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=Vo7WP4LmAWMjcqmOIdpRol4bf0P8ZM1Pto+rf6Pgo44=; b=adV/+JRAmjNPqTedcUeeA7jsmuvP35xm+Yad53DmKPbKwc8GOSlt4JNmEdokshbj06 GsLTr0MT8EEakVxEGOuudXnfcd7pwHflAdx+ghEeyEpb2aShU25YTfUtxPX9SLmEsMtL VQdU7nZEyJ5aUkvCG/Igxf1t27yB/pwqsq01+APAds2vAKC5OAHcDt4JMWnuYqn8jNDV +0GoN+Hq4DpOyfbTXLJ2E/mJ9jMMFYDoHNogmlhFwQbugvqHNwbzdFp25Ja6m/pL3BWS 7muSUvZutnZOu+oOUZ/y9H92dsLSoK8rewx9eesSe/Ii6Jn4qxmL0l/Po9ErYqPpi216 1WGA== X-Gm-Message-State: APjAAAUdjDVVCTubdoDy/l5hzF5VmqPRoroARDlSzLNP+Bd2jEWAy2Qz vULtAgCHJXs0EDeuXogrW97j6aPS X-Google-Smtp-Source: APXvYqywNZrQTCU9mtKBRu+2m14Mv3VUt5bYKrQcD4+MG2/LDevZ+rRx5tTumDj/E/2DL7rTNRPM7g== X-Received: by 2002:a2e:3e18:: with SMTP id l24mr20681124lja.68.1553970610352; Sat, 30 Mar 2019 11:30:10 -0700 (PDT) Received: from localhost.localdomain (v902-731.aalto.fi. [130.233.10.238]) by smtp.gmail.com with ESMTPSA id o7sm1060058ljj.23.2019.03.30.11.30.09 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Sat, 30 Mar 2019 11:30:09 -0700 (PDT) From: Ferdinand Blomqvist To: linux-kernel@vger.kernel.org Cc: Thomas Gleixner Subject: [RFC PATCH 2/7] rslib: Fix decoding of shortened codes Date: Sat, 30 Mar 2019 20:29:42 +0200 Message-Id: <20190330182947.8823-3-ferdinand.blomqvist@gmail.com> X-Mailer: git-send-email 2.17.2 In-Reply-To: <20190330182947.8823-1-ferdinand.blomqvist@gmail.com> References: <20190330182947.8823-1-ferdinand.blomqvist@gmail.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The decoder is broken. It only works with full length codes. Signed-off-by: Ferdinand Blomqvist --- lib/reed_solomon/decode_rs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/lib/reed_solomon/decode_rs.c b/lib/reed_solomon/decode_rs.c index 1db74eb098d0..3313bf944ff1 100644 --- a/lib/reed_solomon/decode_rs.c +++ b/lib/reed_solomon/decode_rs.c @@ -99,9 +99,9 @@ if (no_eras > 0) { /* Init lambda to be the erasure locator polynomial */ lambda[1] = alpha_to[rs_modnn(rs, - prim * (nn - 1 - eras_pos[0]))]; + prim * (nn - 1 - (eras_pos[0] + pad)))]; for (i = 1; i < no_eras; i++) { - u = rs_modnn(rs, prim * (nn - 1 - eras_pos[i])); + u = rs_modnn(rs, prim * (nn - 1 - (eras_pos[i] + pad))); for (j = i + 1; j > 0; j--) { tmp = index_of[lambda[j - 1]]; if (tmp != nn) { -- 2.17.2