From patchwork Mon Mar 18 13:29:47 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jijie Shao X-Patchwork-Id: 13595384 X-Patchwork-Delegate: kuba@kernel.org Received: from szxga07-in.huawei.com (szxga07-in.huawei.com [45.249.212.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B2AE33B1AA; Mon, 18 Mar 2024 13:53:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.35 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710770029; cv=none; b=oAJ5gmoOkXd8VXCXiwcqFDORpWVNkx+wXOyLo+SVLBaPPXTNFrvVJ698hfkBmHnjtyuaLhP85vGeqY1aJ3NOIAMXDWTXNio/zBHbmvRIWRytXHWEnl3xOx/VJ6aS7AlLOABDuEhWdqgyGh6Yb33OqnSUsUcK4W+lsxN/biA4vtA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710770029; c=relaxed/simple; bh=Vu96on3ELce8oj2lYXDb7Wwq/sWwPtuQ5VXawLVemTk=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=BxiXZ6BcuEjYfkahmS7eN+5KlmaZYDJal4a12hB5lr0qn/eBlfYX/fbwvEDIFBuE36QW5tL/IsL4wSBBuSjYMqffFleEShBFzZsHS35K/2JlNQFUeGxJA9zyQ4RWoxQ0VsNh8yPUtzGrVkQwelTPWH5Y1dd4PvLZymXAL6fLmqE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com; spf=pass smtp.mailfrom=huawei.com; arc=none smtp.client-ip=45.249.212.35 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=huawei.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huawei.com Received: from mail.maildlp.com (unknown [172.19.88.234]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4Tywkq0z5Vz1QBtL; Mon, 18 Mar 2024 21:32:19 +0800 (CST) Received: from kwepemm600007.china.huawei.com (unknown [7.193.23.208]) by mail.maildlp.com (Postfix) with ESMTPS id 3A19C1400CB; Mon, 18 Mar 2024 21:34:51 +0800 (CST) Received: from localhost.localdomain (10.67.165.2) by kwepemm600007.china.huawei.com (7.193.23.208) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.35; Mon, 18 Mar 2024 21:34:50 +0800 From: Jijie Shao To: , , , , , , , CC: , , , , , Subject: [PATCH V3 net 2/3] net: hns3: fix kernel crash when devlink reload during pf initialization Date: Mon, 18 Mar 2024 21:29:47 +0800 Message-ID: <20240318132948.3624333-3-shaojijie@huawei.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20240318132948.3624333-1-shaojijie@huawei.com> References: <20240318132948.3624333-1-shaojijie@huawei.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To kwepemm600007.china.huawei.com (7.193.23.208) X-Patchwork-Delegate: kuba@kernel.org From: Yonglong Liu The devlink reload process will access the hardware resources, but the register operation is done before the hardware is initialized. so, if process the devlink reload during initialization, may lead to kernel crash. This patch fixes this by checking whether the NIC is initialized. Fixes: b741269b2759 ("net: hns3: add support for registering devlink for PF") Signed-off-by: Yonglong Liu Signed-off-by: Jijie Shao --- drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c index 9a939c0b217f..80db4f7b05f6 100644 --- a/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c +++ b/drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_devlink.c @@ -40,8 +40,9 @@ static int hclge_devlink_reload_down(struct devlink *devlink, bool netns_change, struct pci_dev *pdev = hdev->pdev; int ret; - if (test_bit(HCLGE_STATE_RST_HANDLING, &hdev->state)) { - dev_err(&pdev->dev, "reset is handling\n"); + if (test_bit(HCLGE_STATE_RST_HANDLING, &hdev->state) || + !test_bit(HCLGE_STATE_NIC_REGISTERED, &hdev->state)) { + dev_err(&pdev->dev, "reset is handling or driver removed\n"); return -EBUSY; }