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=-6.8 required=3.0 tests=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=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 33117C433DF for ; Tue, 16 Jun 2020 15:46:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 163582071A for ; Tue, 16 Jun 2020 15:46:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592322377; bh=oluWiXeVGv0Ky+tN6UzP0UolWQyFZV9ATfA0OJh9XxE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=WWjHfnpF9pwCQhDRalpXX5jayh49309gXdJXBbBOmBAfX+e8qJqsD5oDFkMEnFjfp YpmgcNYnsAYXSIM/g7lPWDNvW+RGyeIMxYmJ5+HitEbr3i9WhK7gzdl0WDYu1io+l6 QBuD7nHs90FHF2LF2dTl2RFzbQHjAdFD1JJBZfsA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732187AbgFPPqP (ORCPT ); Tue, 16 Jun 2020 11:46:15 -0400 Received: from mail.kernel.org ([198.145.29.99]:37952 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732163AbgFPPqK (ORCPT ); Tue, 16 Jun 2020 11:46:10 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 F08E92071A; Tue, 16 Jun 2020 15:46:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592322368; bh=oluWiXeVGv0Ky+tN6UzP0UolWQyFZV9ATfA0OJh9XxE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ofJ9MneWClrgcTAIk3gSvc1/ZR1LPFCsHooSBxLOk+58tfIAQQstvGesOs0cZglml 3Civ+V4S0O38qWLDkE1XPKYPJoBNYkvadG8THqk9vYOXRvwpaCXIzm0Tk52Z98O6gE 3q7ZhHAeksUwIQA4dj1/UEVis4Wuve1fn6Lt9em4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Corentin Labbe , "David S. Miller" Subject: [PATCH 5.7 105/163] net: cadence: macb: disable NAPI on error Date: Tue, 16 Jun 2020 17:34:39 +0200 Message-Id: <20200616153111.847797629@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200616153106.849127260@linuxfoundation.org> References: <20200616153106.849127260@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Corentin Labbe [ Upstream commit 014406babc1f5f887a08737566b5b356c7018242 ] When the PHY is not working, the macb driver crash on a second try to setup it. [ 78.545994] macb e000b000.ethernet eth0: Could not attach PHY (-19) ifconfig: SIOCSIFFLAGS: No such device [ 78.655457] ------------[ cut here ]------------ [ 78.656014] kernel BUG at /linux-next/include/linux/netdevice.h:521! [ 78.656504] Internal error: Oops - BUG: 0 [#1] SMP ARM [ 78.657079] Modules linked in: [ 78.657795] CPU: 0 PID: 122 Comm: ifconfig Not tainted 5.7.0-next-20200609 #1 [ 78.658202] Hardware name: Xilinx Zynq Platform [ 78.659632] PC is at macb_open+0x220/0x294 [ 78.660160] LR is at 0x0 [ 78.660373] pc : [] lr : [<00000000>] psr: 60000013 [ 78.660716] sp : c89ffd70 ip : c8a28800 fp : c199bac0 [ 78.661040] r10: 00000000 r9 : c8838540 r8 : c8838568 [ 78.661362] r7 : 00000001 r6 : c8838000 r5 : c883c000 r4 : 00000000 [ 78.661724] r3 : 00000010 r2 : 00000000 r1 : 00000000 r0 : 00000000 [ 78.662187] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 78.662635] Control: 10c5387d Table: 08b64059 DAC: 00000051 [ 78.663035] Process ifconfig (pid: 122, stack limit = 0x(ptrval)) [ 78.663476] Stack: (0xc89ffd70 to 0xc8a00000) [ 78.664121] fd60: 00000000 c89fe000 c8838000 c89fe000 [ 78.664866] fd80: 00000000 c11ff9ac c8838028 00000000 00000000 c0de6f2c 00000001 c1804eec [ 78.665579] fda0: c19b8178 c8838000 00000000 ca760866 c8838000 00000001 00001043 c89fe000 [ 78.666355] fdc0: 00001002 c0de72f4 c89fe000 c0de8dc0 00008914 c89fe000 c199bac0 ca760866 [ 78.667111] fde0: c89ffddc c8838000 00001002 00000000 c8838138 c881010c 00008914 c0de7364 [ 78.667862] fe00: 00000000 c89ffe70 c89fe000 ffffffff c881010c c0e8bd48 00000003 00000000 [ 78.668601] fe20: c8838000 c8810100 39c1118f 00039c11 c89a0960 00001043 00000000 000a26d0 [ 78.669343] fe40: b6f43000 ca760866 c89a0960 00000051 befe6c50 00008914 c8b2a3c0 befe6c50 [ 78.670086] fe60: 00000003 ee610500 00000000 c0e8ef58 30687465 00000000 00000000 00000000 [ 78.670865] fe80: 00001043 00000000 000a26d0 b6f43000 c89a0600 ee40ae7c c8870d00 c0ddabf4 [ 78.671593] fea0: c89ffeec c0ddabf4 c89ffeec c199bac0 00008913 c0ddac48 c89ffeec c89fe000 [ 78.672324] fec0: befe6c50 ca760866 befe6c50 00008914 c89fe000 befe6c50 c8b2a3c0 c0dc00e4 [ 78.673088] fee0: c89a0480 00000201 00000cc0 30687465 00000000 00000000 00000000 00001002 [ 78.673822] ff00: 00000000 000a26d0 b6f43000 ca760866 00008914 c8b2a3c0 000a0ec4 c8b2a3c0 [ 78.674576] ff20: befe6c50 c04b21bc 000d5004 00000817 c89a0480 c0315f94 00000000 00000003 [ 78.675415] ff40: c19a2bc8 c8a3cc00 c89fe000 00000255 00000000 00000000 00000000 000d5000 [ 78.676182] ff60: 000f6000 c180b2a0 00000817 c0315e64 000d5004 c89fffb0 b6ec0c30 ca760866 [ 78.676928] ff80: 00000000 000b609b befe6c50 000a0ec4 00000036 c03002c4 c89fe000 00000036 [ 78.677673] ffa0: 00000000 c03000c0 000b609b befe6c50 00000003 00008914 befe6c50 000b609b [ 78.678415] ffc0: 000b609b befe6c50 000a0ec4 00000036 befe6e0c befe6f1a 000d5150 00000000 [ 78.679154] ffe0: 000d41e4 befe6bf4 00019648 b6e4509c 20000010 00000003 00000000 00000000 [ 78.681059] [] (macb_open) from [] (__dev_open+0xd0/0x154) [ 78.681571] [] (__dev_open) from [] (__dev_change_flags+0x16c/0x1c4) [ 78.682015] [] (__dev_change_flags) from [] (dev_change_flags+0x18/0x48) [ 78.682493] [] (dev_change_flags) from [] (devinet_ioctl+0x5e4/0x75c) [ 78.682945] [] (devinet_ioctl) from [] (inet_ioctl+0x1f0/0x3b4) [ 78.683381] [] (inet_ioctl) from [] (sock_ioctl+0x39c/0x664) [ 78.683818] [] (sock_ioctl) from [] (ksys_ioctl+0x2d8/0x9c0) [ 78.684343] [] (ksys_ioctl) from [] (ret_fast_syscall+0x0/0x54) [ 78.684789] Exception stack(0xc89fffa8 to 0xc89ffff0) [ 78.685346] ffa0: 000b609b befe6c50 00000003 00008914 befe6c50 000b609b [ 78.686106] ffc0: 000b609b befe6c50 000a0ec4 00000036 befe6e0c befe6f1a 000d5150 00000000 [ 78.686710] ffe0: 000d41e4 befe6bf4 00019648 b6e4509c [ 78.687582] Code: 9a000003 e5983078 e3130001 1affffef (e7f001f2) [ 78.688788] ---[ end trace e3f2f6ab69754eae ]--- This is due to NAPI left enabled if macb_phylink_connect() fail. Fixes: 7897b071ac3b ("net: macb: convert to phylink") Signed-off-by: Corentin Labbe Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- drivers/net/ethernet/cadence/macb_main.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/net/ethernet/cadence/macb_main.c +++ b/drivers/net/ethernet/cadence/macb_main.c @@ -2558,13 +2558,16 @@ static int macb_open(struct net_device * err = macb_phylink_connect(bp); if (err) - goto pm_exit; + goto napi_exit; netif_tx_start_all_queues(dev); if (bp->ptp_info) bp->ptp_info->ptp_init(dev); +napi_exit: + for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) + napi_disable(&queue->napi); pm_exit: if (err) { pm_runtime_put_sync(&bp->pdev->dev);