From patchwork Thu Nov 5 17:14:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heiner Kallweit X-Patchwork-Id: 1395137 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256 header.s=20161025 header.b=rqzO3mG9; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4CRqs915wRz9sSn for ; Fri, 6 Nov 2020 04:15:09 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731573AbgKERO6 (ORCPT ); Thu, 5 Nov 2020 12:14:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42388 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727851AbgKERO5 (ORCPT ); Thu, 5 Nov 2020 12:14:57 -0500 Received: from mail-wm1-x342.google.com (mail-wm1-x342.google.com [IPv6:2a00:1450:4864:20::342]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E0F02C0613D2 for ; Thu, 5 Nov 2020 09:14:56 -0800 (PST) Received: by mail-wm1-x342.google.com with SMTP id d142so2339085wmd.4 for ; Thu, 05 Nov 2020 09:14:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:subject:to:cc:message-id:date:user-agent:mime-version :content-language:content-transfer-encoding; bh=eB/exOtN1wMm6HlL4BUzoLrvtR6RF+J6VdvQMAdKsIQ=; b=rqzO3mG9YkDQdCPDtQMHeeFaRu3Dwu6yUo/IK7F/cxke1hRVR2kP4Nt1XRZF0dQGZH B670KQiaNZAQwCM+AzPsif8lOUqMjGjDkwaOhaej/GeblbVrmFLqLHbIUaezIGgnfXQF GBDktNwlIsrLdIBFrl2ZPUgpB4oyLNW+Izc6j6SkN/D3Hc8m0lxjMCgJWbTMnXEr9en1 FxaIb/uC92XM/LH+SusCHtBwsEcOqf+p1tjkHXq3LwY716RKB5c0XYvowDK10L2WYEPh T5Lwb288cLC/tYuZVYZAnSGQ+vc39iZ+9R1Wrl1L7zLCmYlkAnjEUnRUpr1RQkTKCAyQ UwAQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:subject:to:cc:message-id:date:user-agent :mime-version:content-language:content-transfer-encoding; bh=eB/exOtN1wMm6HlL4BUzoLrvtR6RF+J6VdvQMAdKsIQ=; b=ZPntvkc4jISYIzewZuNYfKtRImViBmCgytPxn7mKJnhu6JG3ut96EK5BLuX20/zz1N KN96YBmtjNmOovjy36Yayhuu8lTXWj4O/wKvkVs58Xc055HfQ00FLhUXyMr487sVpDu9 D+zy3AS8sTGvDccHL4CRwhHGcMcRp2xfJ7pSPmZNqPYju4lJCXKyP8C2lI6EnCXN+k5e +0H8Dz8dkobkaEIBzultfVTfX6+lN2tOSurw9tyy7CEd4Yom5VJ40HZmuRVtR4GPiav9 TpX0epzkXwXOPjnRFCuJNMPs77D6+OXeSuWDU8+5WNiFbhJvPmQg/BExsFso6LmW1AZr RSbQ== X-Gm-Message-State: AOAM530IEc+NMxOFoq9cIggpMeQ9noYCrgo5/gJTEZm6TNdxGWnWOTf6 Bbix1XA8BZLdcOvoeJOCanr3hqQIta10ew== X-Google-Smtp-Source: ABdhPJzCV2HHWy+jmJ1H5qNpO3XMYDE4UvQDH+vG7GgF3rUS/wVKLJMhAPQuMGlr1GBq4OfzCYpP8Q== X-Received: by 2002:a1c:2ed3:: with SMTP id u202mr3873515wmu.85.1604596495355; Thu, 05 Nov 2020 09:14:55 -0800 (PST) Received: from ?IPv6:2003:ea:8f23:2800:59d0:7417:1e79:f522? (p200300ea8f23280059d074171e79f522.dip0.t-ipconnect.de. [2003:ea:8f23:2800:59d0:7417:1e79:f522]) by smtp.googlemail.com with ESMTPSA id l11sm3585037wro.89.2020.11.05.09.14.54 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Nov 2020 09:14:54 -0800 (PST) From: Heiner Kallweit Subject: [PATCH v2 net] r8169: disable hw csum for short packets on all chip versions To: Jakub Kicinski , David Miller , Realtek linux nic maintainers Cc: "netdev@vger.kernel.org" Message-ID: <7fbb35f0-e244-ef65-aa55-3872d7d38698@gmail.com> Date: Thu, 5 Nov 2020 18:14:47 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.4.0 MIME-Version: 1.0 Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org RTL8125B has same or similar short packet hw padding bug as RTL8168evl. The main workaround has been extended accordingly, however we have to disable also hw checksumming for short packets on affected new chip versions. Instead of checking for an affected chip version let's simply disable hw checksumming for short packets in general. v2: - remove the version checks and disable short packet hw csum in general - reflect this in commit title and message Fixes: 0439297be951 ("r8169: add support for RTL8125B") Signed-off-by: Heiner Kallweit --- drivers/net/ethernet/realtek/r8169_main.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c index c5d5c1cfc..aa6f8b16d 100644 --- a/drivers/net/ethernet/realtek/r8169_main.c +++ b/drivers/net/ethernet/realtek/r8169_main.c @@ -4314,18 +4314,9 @@ static netdev_features_t rtl8169_features_check(struct sk_buff *skb, rtl_chip_supports_csum_v2(tp)) features &= ~NETIF_F_ALL_TSO; } else if (skb->ip_summed == CHECKSUM_PARTIAL) { - if (skb->len < ETH_ZLEN) { - switch (tp->mac_version) { - case RTL_GIGA_MAC_VER_11: - case RTL_GIGA_MAC_VER_12: - case RTL_GIGA_MAC_VER_17: - case RTL_GIGA_MAC_VER_34: - features &= ~NETIF_F_CSUM_MASK; - break; - default: - break; - } - } + /* work around hw bug on some chip versions */ + if (skb->len < ETH_ZLEN) + features &= ~NETIF_F_CSUM_MASK; if (transport_offset > TCPHO_MAX && rtl_chip_supports_csum_v2(tp))