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=-2.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 AF12EC3279B for ; Fri, 6 Jul 2018 10:29:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6787823F04 for ; Fri, 6 Jul 2018 10:29:55 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6787823F04 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753225AbeGFK3v (ORCPT ); Fri, 6 Jul 2018 06:29:51 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:9208 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932310AbeGFK33 (ORCPT ); Fri, 6 Jul 2018 06:29:29 -0400 Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 6B0C4A868C1AC; Fri, 6 Jul 2018 18:29:15 +0800 (CST) Received: from S00293818-DELL1.huawei.com (10.202.226.54) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.382.0; Fri, 6 Jul 2018 18:29:07 +0800 From: Salil Mehta To: CC: , , , , , , , Yunsheng Lin Subject: [PATCH net-next 07/10] net: hns3: Fix warning bug when doing lp selftest Date: Fri, 6 Jul 2018 11:28:01 +0100 Message-ID: <20180706102804.196-8-salil.mehta@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180706102804.196-1-salil.mehta@huawei.com> References: <20180706102804.196-1-salil.mehta@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.202.226.54] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Yunsheng Lin The napi_alloc_skb is excepted to be called under the non-preemptible code path when it is called by hns3_clean_rx_ring during loopback selftest, otherwise the below warning will be logged: [ 92.420780] BUG: using smp_processor_id() in preemptible [00000000] code: ethtool/1873 [ 92.463202] check_preemption_disabled+0xf8/0x100 [ 92.467893] debug_smp_processor_id+0x1c/0x28 [ 92.472239] __napi_alloc_skb+0x30/0x130 [ 92.476158] hns3_clean_rx_ring+0x118/0x5f0 [hns3] [ 92.480941] hns3_self_test+0x32c/0x4d0 [hns3] [ 92.485375] ethtool_self_test+0xdc/0x1e8 [ 92.489372] dev_ethtool+0x1020/0x1da8 [ 92.493109] dev_ioctl+0x188/0x3a0 [ 92.496499] sock_do_ioctl+0xf4/0x208 [ 92.500148] sock_ioctl+0x228/0x3e8 [ 92.503626] do_vfs_ioctl+0xc4/0x880 [ 92.507189] SyS_ioctl+0x94/0xa8 [ 92.510404] el0_svc_naked+0x30/0x34 This patch fix it by disabling preemption when calling hns3_clean_rx_ring during loopback selftest. Fixes: c39c4d98dc65 ("net: hns3: Add mac loopback selftest support in hns3 driver") Signed-off-by: Yunsheng Lin Signed-off-by: Peng Li Signed-off-by: Salil Mehta --- drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c index 40c0425..11620e0 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3_ethtool.c @@ -201,7 +201,9 @@ static u32 hns3_lb_check_rx_ring(struct hns3_nic_priv *priv, u32 budget) rx_group = &ring->tqp_vector->rx_group; pre_rx_pkt = rx_group->total_packets; + preempt_disable(); hns3_clean_rx_ring(ring, budget, hns3_lb_check_skb_data); + preempt_enable(); rcv_good_pkt_total += (rx_group->total_packets - pre_rx_pkt); rx_group->total_packets = pre_rx_pkt; -- 2.7.4