From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-1372482-1517178934-2-1589831730082575992 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.001, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='com', MailFrom='org', XOriginatingCountry='US' X-Spam-charsets: plain='iso-8859-1' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1517178933; b=spQomF+5GK/24Sx0Gpa1wGERkp9ZAen62KYS1aCc/8wwQjA 9OCIjGrn0MRI9G+Ht4ES2fFSVBR6YsHKtJM4vOxkSWKrslJ09YxEmadqBOZdZRcM xNQWZOIBNTxelly+3LS1b9rLOmpoueCSVYrsMkhfX2unhBUlWQF5YKTezXnoKAyT CElS0D3Y2M+nMonTuZghNoQksT8JLHKavNS/qK1Kb8HOrkII/gGmeIA5hm62XSDT SIsbvbj9JXM9TxkiyK7FPkESCxKBY8F+oPBKAVKmCrJ4sLTULcHiwGnnWUkwQUGx VIsSrxr5R2H+CB1OkXmapx8PVb4IBND++hEBoCQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :references:in-reply-to:content-type:content-transfer-encoding :mime-version:sender:list-id; s=arctest; t=1517178933; bh=BWJi4Z ZMFjB6EvM4R/K3CZYtWkXVQGbhpLM1QuG4ktE=; b=J0CMmi26K1BN3rpm6BVM1P JlawXU1FivQDs6BQ7QM0wMqWEGZkw7K31F+x88euSjHiA6sySSEHD+LqBUnEvaOy HR9Efdr0BoRCOTyM+dD3gS4bzDnhkwV++a1w8pWfSTzqx17CkV/eTUwlSG3e/TjB JvzrT1nrcGX6k3wnm5OQrTjS0SzlgbHyVr4trHDvDqEqq2mJRom90Cyg8AUgHPP/ B+omsl34EYW3y8RDhBnXqbvv5Ws4AFjKUEd/EAVUEH+4Pka+ZjUZMN3H5jvHj1/J ZS8/CPpmfqRrK5Rreh1Y1pDDwRpiI4/b0h6mOW+a2mcaYZwPhby539U3YUgajTVQ == ARC-Authentication-Results: i=1; mx5.messagingengine.com; arc=none (no signatures found); dkim=pass (1024-bit rsa key sha256) header.d=microsoft.com header.i=@microsoft.com header.b=M7a3m4sh x-bits=1024 x-keytype=rsa x-algorithm=sha256 x-selector=selector1; dmarc=pass (p=reject,has-list-id=yes,d=none) header.from=microsoft.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=microsoft.com header.result=pass header_is_org_domain=yes Authentication-Results: mx5.messagingengine.com; arc=none (no signatures found); dkim=pass (1024-bit rsa key sha256) header.d=microsoft.com header.i=@microsoft.com header.b=M7a3m4sh x-bits=1024 x-keytype=rsa x-algorithm=sha256 x-selector=selector1; dmarc=pass (p=reject,has-list-id=yes,d=none) header.from=microsoft.com; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=microsoft.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932199AbeA1WfC (ORCPT ); Sun, 28 Jan 2018 17:35:02 -0500 Received: from mail-cys01nam02on0129.outbound.protection.outlook.com ([104.47.37.129]:29515 "EHLO NAM02-CY1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932152AbeA1Wag (ORCPT ); Sun, 28 Jan 2018 17:30:36 -0500 From: Sasha Levin To: "linux-kernel@vger.kernel.org" , "stable@vger.kernel.org" CC: Zumeng Chen , "David S . Miller" , Sasha Levin Subject: [PATCH AUTOSEL for 3.18 11/25] gianfar: fix a flooded alignment reports because of padding issue. Thread-Topic: [PATCH AUTOSEL for 3.18 11/25] gianfar: fix a flooded alignment reports because of padding issue. Thread-Index: AQHTmIeBa1GIXpEGa0ORhpl5DfU81w== Date: Sun, 28 Jan 2018 22:29:49 +0000 Message-ID: <20180128222931.7781-11-alexander.levin@microsoft.com> References: <20180128222931.7781-1-alexander.levin@microsoft.com> In-Reply-To: <20180128222931.7781-1-alexander.levin@microsoft.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [52.168.54.252] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1;MW2PR2101MB1098;7:KjTAEY3l3+OfbOsrT40VIPpUbWx+k1roYDKlyQUTEDdzdMSziiJRdkulSt9imkLDlPuFKmL/ZyMc2HimYt2l0D8xU4pasbiUSd7oDOoaLpjG8DbZRu7wgyY2iezo3h9VhI5YIV9IRBzLdokpejzFMc4KqC+I1FpwJ1bRDVr6dFKTl960YYSYFPWJ+gdn7KO7OrYyVKeebmXEADI7vgv3pqc1DDoRTvHGyrg2HyseOtpEqTeC6kyvsL8WdswXS5hY x-ms-office365-filtering-ht: Tenant x-ms-office365-filtering-correlation-id: e01c2bbd-944d-4f1f-ea49-08d5669ebda7 x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:(7020095)(4652020)(4534165)(4627221)(201703031133081)(201702281549075)(48565401081)(5600026)(4604075)(3008032)(2017052603307)(7193020);SRVR:MW2PR2101MB1098; x-ms-traffictypediagnostic: MW2PR2101MB1098: authentication-results: spf=none (sender IP is ) smtp.mailfrom=Alexander.Levin@microsoft.com; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(28532068793085)(20558992708506)(89211679590171)(85827821059158); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(61425038)(6040501)(2401047)(8121501046)(5005006)(93006095)(93001095)(3002001)(10201501046)(3231101)(944501161)(6055026)(61426038)(61427038)(6041288)(201703131423095)(201702281528075)(20161123555045)(201703061421075)(201703061406153)(20161123564045)(20161123558120)(20161123562045)(20161123560045)(6072148)(201708071742011);SRVR:MW2PR2101MB1098;BCL:0;PCL:0;RULEID:;SRVR:MW2PR2101MB1098; x-forefront-prvs: 05669A7924 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(366004)(346002)(376002)(396003)(39860400002)(39380400002)(189003)(199004)(54906003)(7736002)(66066001)(305945005)(316002)(72206003)(106356001)(2950100002)(6666003)(478600001)(10290500003)(6506007)(97736004)(2906002)(105586002)(25786009)(107886003)(5250100002)(8676002)(110136005)(14454004)(5660300001)(2501003)(22452003)(2900100001)(81156014)(68736007)(6436002)(8936002)(53936002)(10090500001)(81166006)(99286004)(102836004)(3660700001)(36756003)(3280700002)(86612001)(575784001)(3846002)(6116002)(86362001)(1076002)(4326008)(26005)(39060400002)(76176011)(6512007)(6486002)(186003)(22906009)(217873001);DIR:OUT;SFP:1102;SCL:1;SRVR:MW2PR2101MB1098;H:MW2PR2101MB1034.namprd21.prod.outlook.com;FPR:;SPF:None;PTR:InfoNoRecords;MX:1;A:1;LANG:en; x-microsoft-antispam-message-info: F3/V+F42wikfewHB9O2kt09RUszjNXS7tiqb7u3s108Z42g5vgLnlx+P4eRPNt+o9JiAVXPy0Zm98PSlqX4GYg== spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: e01c2bbd-944d-4f1f-ea49-08d5669ebda7 X-MS-Exchange-CrossTenant-originalarrivaltime: 28 Jan 2018 22:29:49.2827 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW2PR2101MB1098 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: From: Zumeng Chen [ Upstream commit 58117672943734715bbe7565ac9f062effa524f0 ] According to LS1021A RM, the value of PAL can be set so that the start of t= he IP header in the receive data buffer is aligned to a 32-bit boundary. Norma= lly, setting PAL =3D 2 provides minimal padding to ensure such alignment of the = IP header. However every incoming packet's 8-byte time stamp will be inserted into the packet data buffer as padding alignment bytes when hardware time stamping i= s enabled. So we set the padding 8+2 here to avoid the flooded alignment faults: root@128:~# cat /proc/cpu/alignment User: 0 System: 17539 (inet_gro_receive+0x114/0x2c0) Skipped: 0 Half: 0 Word: 0 DWord: 0 Multi: 17539 User faults: 2 (fixup) Also shown when exception report enablement CPU: 0 PID: 161 Comm: irq/66-eth1_g0_ Not tainted 4.1.21-rt13-WR8.0.0.0_pre= empt-rt #16 Hardware name: Freescale LS1021A [<8001b420>] (unwind_backtrace) from [<8001476c>] (show_stack+0x20/0x24) [<8001476c>] (show_stack) from [<807cfb48>] (dump_stack+0x94/0xac) [<807cfb48>] (dump_stack) from [<80025d70>] (do_alignment+0x720/0x958) [<80025d70>] (do_alignment) from [<80009224>] (do_DataAbort+0x40/0xbc) [<80009224>] (do_DataAbort) from [<80015398>] (__dabt_svc+0x38/0x60) Exception stack(0x86ad1cc0 to 0x86ad1d08) 1cc0: f9b3e080 86b3d072 2d78d287 00000000 866816c0 86b3d05e 86e785d0 000000= 00 1ce0: 00000011 0000000e 80840ab0 86ad1d3c 86ad1d08 86ad1d08 806d7fc0 806d80= 6c 1d00: 40070013 ffffffff [<80015398>] (__dabt_svc) from [<806d806c>] (inet_gro_receive+0x114/0x2c0) [<806d806c>] (inet_gro_receive) from [<80660eec>] (dev_gro_receive+0x21c/0x= 3c0) [<80660eec>] (dev_gro_receive) from [<8066133c>] (napi_gro_receive+0x44/0x1= 7c) [<8066133c>] (napi_gro_receive) from [<804f0538>] (gfar_clean_rx_ring+0x39c= /0x7d4) [<804f0538>] (gfar_clean_rx_ring) from [<804f0bf4>] (gfar_poll_rx_sq+0x58/0= xe0) [<804f0bf4>] (gfar_poll_rx_sq) from [<80660b10>] (net_rx_action+0x27c/0x43c= ) [<80660b10>] (net_rx_action) from [<80033638>] (do_current_softirqs+0x1e0/0= x3dc) [<80033638>] (do_current_softirqs) from [<800338c4>] (__local_bh_enable+0x9= 0/0xa8) [<800338c4>] (__local_bh_enable) from [<8008025c>] (irq_forced_thread_fn+0x= 70/0x84) [<8008025c>] (irq_forced_thread_fn) from [<800805e8>] (irq_thread+0x16c/0x2= 44) [<800805e8>] (irq_thread) from [<8004e490>] (kthread+0xe8/0x104) [<8004e490>] (kthread) from [<8000fda8>] (ret_from_fork+0x14/0x2c) Signed-off-by: Zumeng Chen Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- drivers/net/ethernet/freescale/gianfar.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/freescale/gianfar.c b/drivers/net/etherne= t/freescale/gianfar.c index 4fdf0aa16978..f239b0c845cd 100644 --- a/drivers/net/ethernet/freescale/gianfar.c +++ b/drivers/net/ethernet/freescale/gianfar.c @@ -1356,9 +1356,11 @@ static int gfar_probe(struct platform_device *ofdev) =20 gfar_init_addr_hash_table(priv); =20 - /* Insert receive time stamps into padding alignment bytes */ + /* Insert receive time stamps into padding alignment bytes, and + * plus 2 bytes padding to ensure the cpu alignment. + */ if (priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) - priv->padding =3D 8; + priv->padding =3D 8 + DEFAULT_PADDING; =20 if (dev->features & NETIF_F_IP_CSUM || priv->device_flags & FSL_GIANFAR_DEV_HAS_TIMER) --=20 2.11.0