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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 96125FA0C32 for ; Wed, 15 Apr 2026 06:06:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:MIME-Version:Content-Type: Content-Transfer-Encoding:References:In-Reply-To:Message-Id:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=4SWD3oYMo/OSgAIlg8xpmXUcvH3V62NjbPvp5lRIQx0=; b=aLmKVxn+D+pI04R3nSDXNB+sbX urrY2JIfcYbEJXqwvVp8zRxKlSSOINA58TVe/uxZph89iYImt2RNEQgdnstK0O0rdaeZQ1B43NqEE K1EEa0olxwJm0/LTvySbsKfG6sPYne5uP8UZ3PSpD3x/UItD1cp5OJ3NRwWEjoyUhrzg8lTbhMFoX KHH5EfT2sBzHfbkrIg18vImGxOn+xobiCEiJd0+NZU+6hELX6m2Zkm8ZPbSYGANzD18pPf3vK08UR ImobgqQ04l5HVCJ25z1uBD7W6F4gK3G3uzr61fXDKc/lSB92GDahXPK3wTOHnYJuY20sXRlb4bV84 vIY+IMEg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wCtOn-00000000cnK-0FW6; Wed, 15 Apr 2026 06:06:53 +0000 Received: from mail-francecentralazlp170130007.outbound.protection.outlook.com ([2a01:111:f403:c20a::7] helo=PA4PR04CU001.outbound.protection.outlook.com) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wCtOi-00000000ckB-2aZM for linux-arm-kernel@lists.infradead.org; Wed, 15 Apr 2026 06:06:49 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=HS6O4Il+d6L2SkGQAev8AefqIdNOwByJ1W+5N9OQUf9ANA1Ne6tlA+CSBUnAXMJa0wEbavex0rTvEv4gLxPsb4bPQ/5KitRPwc/s9KAWMEVZsdLHX73BLI6hHnl0flMQvk/V9efjSt4aol5VC5H/rx81eqt4n/NBZLmE/macqgQ4Q9PE2M6ap1iNjt1f55Xg6sXmA6UBpCXiey9Enk612/SHCM5GJddX+dSa6RyHr9zBvT+8ZVBfiBYu1Eon2nGXbmSdJT7ukrnAVhi4lRH/fo7E1a/MO8y74VVyHJDUqktJfICDtBM7xWBugHqFOR8TcnJlgxY8qBzG7ZFSWQrL+g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=4SWD3oYMo/OSgAIlg8xpmXUcvH3V62NjbPvp5lRIQx0=; b=sxDT8sJR4xOGzVv7zrvst8t2bNZiUZhJ3osu+X9lVVykLM4FgaC5FJWDsTHbp2GtdJ2j5ilg6iQlAQMEJikkBYmkGo0ig96wR5acNxaLSLR1Fvr/6/zgfbKLcMmD5U1azn4fqJkWQ/7EKRAy2c4dUSOmlMGkdYrSxIHPG6r8TsqiEgu2HzKj4eHyGaUGFmvrS2zQvNuySzsydZhoH5D/0R6OPX7rLdhq6Ogo96d+tasZP6sk81CbVQei2Q9KFioZTafpgs/GkHhUBMx5y/+hSyOgoTD4bmPhhIiMFeyISr9kadZo3/DtQ/+VjS8zJCY0sR7i/dY1MdXiRtL9KVlAqw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nxp.com; dmarc=pass action=none header.from=nxp.com; dkim=pass header.d=nxp.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=4SWD3oYMo/OSgAIlg8xpmXUcvH3V62NjbPvp5lRIQx0=; b=gftyaAGk1xPM67RqWX7FCg4dF2rmZqJHlzwWeFbCsAEVT+Bc9svfq1KyTzBlNGLx4APOzxIKAWWMDB2CQ3Taglwfq72X22bysczEEnvIW8pKLellDu28mGgS6lw3Y6Ox6NTVrzxWAp7rvnJLDj5RRfoHPW0ETz6eg8VmXH6j3mIT+65Nv0a2UVdk1vUFa3H9jgOTYZKh4dzdOdZjUsj5irIAsGNaH9gt3Sm/7XyhMwFbbiv2FeXC5ehBe8sVNu6qGRUIMXD0eDl+CJPJDv0s2riMK/KnT7SmsuM+EzSJ+0Z1OxRHe7qbRzSVBd+SNlKgA6itQtZ6P0CguUAHO5fBqg== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nxp.com; Received: from AM8PR04MB7284.eurprd04.prod.outlook.com (2603:10a6:20b:1dc::8) by AS8PR04MB7701.eurprd04.prod.outlook.com (2603:10a6:20b:293::18) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9769.48; Wed, 15 Apr 2026 06:06:19 +0000 Received: from AM8PR04MB7284.eurprd04.prod.outlook.com ([fe80::9cd6:51bd:82b:98dc]) by AM8PR04MB7284.eurprd04.prod.outlook.com ([fe80::9cd6:51bd:82b:98dc%5]) with mapi id 15.20.9769.046; Wed, 15 Apr 2026 06:06:19 +0000 From: Wei Fang To: claudiu.manoil@nxp.com, vladimir.oltean@nxp.com, xiaoning.wang@nxp.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, chleroy@kernel.org Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, imx@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 net 1/2] net: enetc: correct the command BD ring consumer index Date: Wed, 15 Apr 2026 14:08:32 +0800 Message-Id: <20260415060833.2303846-2-wei.fang@nxp.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260415060833.2303846-1-wei.fang@nxp.com> References: <20260415060833.2303846-1-wei.fang@nxp.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: SG2PR06CA0243.apcprd06.prod.outlook.com (2603:1096:4:ac::27) To AM8PR04MB7284.eurprd04.prod.outlook.com (2603:10a6:20b:1dc::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AM8PR04MB7284:EE_|AS8PR04MB7701:EE_ X-MS-Office365-Filtering-Correlation-Id: 8c37a7ad-841e-4825-f1ee-08de9ab51c9c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|52116014|376014|19092799006|7416014|1800799024|366016|38350700014|22082099003|56012099003|18002099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:AM8PR04MB7284.eurprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(52116014)(376014)(19092799006)(7416014)(1800799024)(366016)(38350700014)(22082099003)(56012099003)(18002099003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?1LkaGLw0uuoPQwGATfaNqEnd98bnGhqhgs8oglz9BdYhnQ7mJ0UO4QoCO7jh?= =?us-ascii?Q?ZfKNvHK8YLr0witSaEnfzQ/IKxQW3UXou9wpej29MQpr1HNNMliWt7bN+98P?= =?us-ascii?Q?D+Hl9Vli3CIj7/xgOTidH8cRGHcEGbEKptQ8OndeysASYkTpNweTk7zgtwYO?= =?us-ascii?Q?JATug+EKUXYRgFLiQL1Aolq1uQ+nrtCxP6czBOWHDBCs212lcnGCWL7QBbqK?= =?us-ascii?Q?zYeysoyxqDh6c46UX6yk0A0LbD+CCV3fyhJ7UhSEps8QZDpdQF0/8LLZ7cdl?= =?us-ascii?Q?NT+ZjJi+eleekEsyFWH9/lq3JpaIupaHt1CJ3WG9oWWOKY9jo6Ji1P2Zbyw2?= =?us-ascii?Q?X03KZZp8NAO+RXPRpvqyTGyE4jz8xtxBTCn/nBBTeSmFyRk2hK6URi7hh3W3?= =?us-ascii?Q?dBZdicSZAC34ghwy6huQXeOvT2iro9c5Ke7D4VeOdQCwJ4Dsnz95vGvnZG4f?= =?us-ascii?Q?z8Wh1bgGQrSk2tytthl8Ame1PPGBPS29sAcxkdZmvj2bbtqjz0fqOmmEweF/?= =?us-ascii?Q?IqrJV7h/mUVtCHDyZWQq2b757BNHgPPA2MAg3vp1JN1nLxqo7JCnPsON31o7?= =?us-ascii?Q?q3fKWBpaCGhxYtZidoqpPWD2vz+GLZG8LIskIwRAJ4Ihyt/yMMkhBXxCM4Zn?= =?us-ascii?Q?+cGPvNM1GxaMB30Fs/pt5VVwkrK4fTEDDnfO+/OpnhEy7mm2RCihNBODRRyG?= =?us-ascii?Q?QmPdVuKvL6rbZCmJMTUEB6V/6lGRtgMNm0bqH7QDSEdW3P7dPH1Bryl7Js8V?= =?us-ascii?Q?6/6JFAIS8WvpNmO6Je9Vcrr4hJTLDh2tmNlZF3vvKsCYzgj4gTnNO4yn5+Eo?= =?us-ascii?Q?tr8HWvTqpPwhrlar230eXxxMdnIWKsXQgY+7Omhk/CNi7JjJ9ifn4TwAML1G?= =?us-ascii?Q?HsmNpDr/nkAi1Ps79cdv0IcO9c9AhqIRoUUgGiZ35c+Fsa6RzbndtnLTZkl7?= =?us-ascii?Q?I8RLxOQbSx0blYCLjPkfzK5cbWrCu8GwmhyjBPahthq0sPglv8LAgiLTWJTH?= =?us-ascii?Q?HbU1yyirmEj/sFVgITtMaJL64ak0qmL0WUmlbDhbm32arxtLnax1jFRVsRGP?= =?us-ascii?Q?CDGQ+8KCV3SoyQJQexfgyyhOkBreWVIMembXYS0dKrTCA11R7ndAKNE7hacu?= =?us-ascii?Q?E+opWr6eDrcN8t6yrgjnpV5rQHoc39iIO/vY7S2e1nsvmO5gHr90+l4rbZXR?= =?us-ascii?Q?E4D34KnkXTca+8AV5ur27jHGfusjGLd3nXZ9oAnkZzPPSXNAPps7LjoOg/wu?= =?us-ascii?Q?q8wx1WZ+/5Xa77rcfI+EmXdEdC1T5wL7TAKQvNce5IOQjbatXA3ehP+moabI?= =?us-ascii?Q?OThkX1uWQjjA7vbJrsxSfRpSus0gd4wlOrPOQOKGXSrtv+/8wVcslaJJbhA1?= =?us-ascii?Q?lCeDw8DnJXho9Oqo8FvKUhGh15qVhi6/90JE0lNNtbCbEvqbnVG7yMltf0Zg?= =?us-ascii?Q?L0nKoSxMicZEONU/eX534f4n/lUdqvoZCen4YSSkxykpuM7YP10/5a873qQI?= =?us-ascii?Q?OWSVPFupV81AjQDH3ZbWQtrMUAJIl0S3Jt+ioDzxL3VWUml6rG+aauisZjI5?= =?us-ascii?Q?q5sB0V7VmSdSdcX8IZVLVnkYTWnehnNyu3QDLBVGhimwGr84seF7XbYkukHe?= =?us-ascii?Q?HlZj0bihEJD42mFICP4q5tMea6INTBWio2IBWcd4UHvl96bABa05vHRkB78A?= =?us-ascii?Q?Z3M9IB9VuFAO1ynUXJYEyadD9VZuWnQNYZBs81OTbO0q++uFhGH6JpuUBezt?= =?us-ascii?Q?irznSUxOrw=3D=3D?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 8c37a7ad-841e-4825-f1ee-08de9ab51c9c X-MS-Exchange-CrossTenant-AuthSource: AM8PR04MB7284.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Apr 2026 06:06:19.7096 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 7oyGzwLZCBxWJng1a287kU3A/5D6ORN79xhx2gxddTp6nGS2AaDlAQB6+iNWZHHSb4ijK4qxhHfY52ths/3DWQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR04MB7701 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260414_230648_664726_107579BB X-CRM114-Status: GOOD ( 18.06 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The command BD ring cousumer index register has the consumer index as the lower 10 bits, and the bit 31 is SBE, which indicates whether a system bus error occurred during execution of the CBD command. So if a system bus error occurs, reading the register will get the SBE bit set. However, the current implementation directly uses the register value as the consumer index without masking it. Therefore, if a system bus error occurs, an incorrect consumer index will be obtained, causing errors in the processing of the command BD ring. Thus, we need to mask out the other bits to obtain the correct consumer index. In addition, this patch adds a check for the SBE bit after the polling loop and returns an error if the bit is set. Fixes: 4701073c3deb ("net: enetc: add initial netc-lib driver to support NTMP") Signed-off-by: Wei Fang --- drivers/net/ethernet/freescale/enetc/ntmp.c | 13 ++++++++++--- drivers/net/ethernet/freescale/enetc/ntmp_private.h | 2 ++ 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/freescale/enetc/ntmp.c b/drivers/net/ethernet/freescale/enetc/ntmp.c index 0c1d343253bf..b188eb2d40c0 100644 --- a/drivers/net/ethernet/freescale/enetc/ntmp.c +++ b/drivers/net/ethernet/freescale/enetc/ntmp.c @@ -55,7 +55,7 @@ int ntmp_init_cbdr(struct netc_cbdr *cbdr, struct device *dev, spin_lock_init(&cbdr->ring_lock); cbdr->next_to_use = netc_read(cbdr->regs.pir); - cbdr->next_to_clean = netc_read(cbdr->regs.cir); + cbdr->next_to_clean = netc_read(cbdr->regs.cir) & NETC_CBDRCIR_INDEX; /* Step 1: Configure the base address of the Control BD Ring */ netc_write(cbdr->regs.bar0, lower_32_bits(cbdr->dma_base_align)); @@ -98,7 +98,7 @@ static void ntmp_clean_cbdr(struct netc_cbdr *cbdr) int i; i = cbdr->next_to_clean; - while (netc_read(cbdr->regs.cir) != i) { + while ((netc_read(cbdr->regs.cir) & NETC_CBDRCIR_INDEX) != i) { cbd = ntmp_get_cbd(cbdr, i); memset(cbd, 0, sizeof(*cbd)); i = (i + 1) % cbdr->bd_num; @@ -135,12 +135,19 @@ static int netc_xmit_ntmp_cmd(struct ntmp_user *user, union netc_cbd *cbd) cbdr->next_to_use = i; netc_write(cbdr->regs.pir, i); - err = read_poll_timeout_atomic(netc_read, val, val == i, + err = read_poll_timeout_atomic(netc_read, val, + (val & NETC_CBDRCIR_INDEX) == i, NETC_CBDR_DELAY_US, NETC_CBDR_TIMEOUT, true, cbdr->regs.cir); if (unlikely(err)) goto cbdr_unlock; + if (unlikely(val & NETC_CBDRCIR_SBE)) { + dev_err(user->dev, "Command BD system bus error\n"); + err = -EIO; + goto cbdr_unlock; + } + dma_rmb(); /* Get the writeback command BD, because the caller may need * to check some other fields of the response header. diff --git a/drivers/net/ethernet/freescale/enetc/ntmp_private.h b/drivers/net/ethernet/freescale/enetc/ntmp_private.h index 34394e40fddd..3459cc45b610 100644 --- a/drivers/net/ethernet/freescale/enetc/ntmp_private.h +++ b/drivers/net/ethernet/freescale/enetc/ntmp_private.h @@ -12,6 +12,8 @@ #define NTMP_EID_REQ_LEN 8 #define NETC_CBDR_BD_NUM 256 +#define NETC_CBDRCIR_INDEX GENMASK(9, 0) +#define NETC_CBDRCIR_SBE BIT(31) union netc_cbd { struct { -- 2.34.1