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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS 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 58A0216256E1 for ; Mon, 30 Jul 2018 16:41:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0DB6C205F4 for ; Mon, 30 Jul 2018 16:41:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0DB6C205F4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=davemloft.net 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 S1731985AbeG3SQ4 (ORCPT ); Mon, 30 Jul 2018 14:16:56 -0400 Received: from shards.monkeyblade.net ([23.128.96.9]:32900 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726962AbeG3SQ4 (ORCPT ); Mon, 30 Jul 2018 14:16:56 -0400 Received: from localhost (c-24-20-22-31.hsd1.or.comcast.net [24.20.22.31]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 0DCAA121068D4; Mon, 30 Jul 2018 09:41:06 -0700 (PDT) Date: Mon, 30 Jul 2018 09:41:05 -0700 (PDT) Message-Id: <20180730.094105.276965999059841658.davem@davemloft.net> To: xiliang@redhat.com Cc: netdev@vger.kernel.org, xen-devel@lists.xenproject.org, jgross@suse.com, boris.ostrovsky@oracle.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH] xen-netfront: wait xenbus state change when load module manually From: David Miller In-Reply-To: <20180727095608.25210-1-xiliang@redhat.com> References: <20180727095608.25210-1-xiliang@redhat.com> X-Mailer: Mew version 6.7 on Emacs 26 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Mon, 30 Jul 2018 09:41:07 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Xiao Liang Date: Fri, 27 Jul 2018 17:56:08 +0800 > When loading module manually, after call xenbus_switch_state to initializes > the state of the netfront device, the driver state did not change so fast > that may lead no dev created in latest kernel. This patch adds wait to make > sure xenbus knows the driver is not in closed/unknown state. ... > Signed-off-by: Xiao Liang Applied and queued up for -stable, thanks.