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=-9.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 E743BC388F7 for ; Tue, 3 Nov 2020 21:14:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9549220757 for ; Tue, 3 Nov 2020 21:14:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604438046; bh=BDLB54T1EWmlc3IeLKus4LZ2V9cyZMOIskMySVU+lDs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Zb4XJ7W6AGaLKrFMsKygjtlvB89O8lWf7DppqaAVy0Xn1uQyCp+M7yCztMuECLMH4 jZDG2DZgqz6gl4hhOTRt3v1zn5z557BYZiPLWcRAoJa+jvFVGsW38e4LELidgii1p7 O70nkt/ogvGUXDmAeMzJpPTgRI1E471aK2hog7qU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389283AbgKCVNa (ORCPT ); Tue, 3 Nov 2020 16:13:30 -0500 Received: from mail.kernel.org ([198.145.29.99]:56528 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389265AbgKCVN3 (ORCPT ); Tue, 3 Nov 2020 16:13:29 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5014622226; Tue, 3 Nov 2020 21:13:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1604438008; bh=BDLB54T1EWmlc3IeLKus4LZ2V9cyZMOIskMySVU+lDs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JeICqmar/Ed7TcLLX7gnY7Y5Xvk//29AOKwqL3nkm0b2+T6rq/EYXaC+Y9pWZC/oO cgK5HPKThxDlxrTeP5Pz/1+c04w2mDEJ+uSB4vf/oi118cVoMKBIfNxPT7if7hflfU 8rFUiZywq5Y1X7DSRZUxb8xIlgrGwhZDlEQQhTPw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alexander Sverdlin Subject: [PATCH 4.14 125/125] staging: octeon: Drop on uncorrectable alignment or FCS error Date: Tue, 3 Nov 2020 21:38:22 +0100 Message-Id: <20201103203215.514681563@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201103203156.372184213@linuxfoundation.org> References: <20201103203156.372184213@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: stable@vger.kernel.org From: Alexander Sverdlin commit 49d28ebdf1e30d806410eefc7de0a7a1ca5d747c upstream. Currently in case of alignment or FCS error if the packet cannot be corrected it's still not dropped. Report the error properly and drop the packet while making the code around a little bit more readable. Fixes: 80ff0fd3ab64 ("Staging: Add octeon-ethernet driver files.") Signed-off-by: Alexander Sverdlin Cc: stable Link: https://lore.kernel.org/r/20201016145630.41852-1-alexander.sverdlin@nokia.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/octeon/ethernet-rx.c | 34 +++++++++++++++++++--------------- 1 file changed, 19 insertions(+), 15 deletions(-) --- a/drivers/staging/octeon/ethernet-rx.c +++ b/drivers/staging/octeon/ethernet-rx.c @@ -83,15 +83,17 @@ static inline int cvm_oct_check_rcv_erro else port = work->word1.cn38xx.ipprt; - if ((work->word2.snoip.err_code == 10) && (work->word1.len <= 64)) { + if ((work->word2.snoip.err_code == 10) && (work->word1.len <= 64)) /* * Ignore length errors on min size packets. Some * equipment incorrectly pads packets to 64+4FCS * instead of 60+4FCS. Note these packets still get * counted as frame errors. */ - } else if (work->word2.snoip.err_code == 5 || - work->word2.snoip.err_code == 7) { + return 0; + + if (work->word2.snoip.err_code == 5 || + work->word2.snoip.err_code == 7) { /* * We received a packet with either an alignment error * or a FCS error. This may be signalling that we are @@ -122,7 +124,10 @@ static inline int cvm_oct_check_rcv_erro /* Port received 0xd5 preamble */ work->packet_ptr.s.addr += i + 1; work->word1.len -= i + 5; - } else if ((*ptr & 0xf) == 0xd) { + return 0; + } + + if ((*ptr & 0xf) == 0xd) { /* Port received 0xd preamble */ work->packet_ptr.s.addr += i; work->word1.len -= i + 4; @@ -132,21 +137,20 @@ static inline int cvm_oct_check_rcv_erro ((*(ptr + 1) & 0xf) << 4); ptr++; } - } else { - printk_ratelimited("Port %d unknown preamble, packet dropped\n", - port); - cvm_oct_free_work(work); - return 1; + return 0; } + + printk_ratelimited("Port %d unknown preamble, packet dropped\n", + port); + cvm_oct_free_work(work); + return 1; } - } else { - printk_ratelimited("Port %d receive error code %d, packet dropped\n", - port, work->word2.snoip.err_code); - cvm_oct_free_work(work); - return 1; } - return 0; + printk_ratelimited("Port %d receive error code %d, packet dropped\n", + port, work->word2.snoip.err_code); + cvm_oct_free_work(work); + return 1; } static void copy_segments_to_skb(cvmx_wqe_t *work, struct sk_buff *skb)