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=unavailable 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 8C8C3C433E0 for ; Tue, 16 Jun 2020 15:48:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6EA4721475 for ; Tue, 16 Jun 2020 15:48:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592322538; bh=DbtZOzDwdgv4mbBqVbgFRQDOuQC1dsbEesFDezdjZ1c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=qLtWaJC6/XkkfZvdjUF1oHPIzHriFVRwD/xD1U7Mrm+1vgJ+58bvrDO492nvLNuQz H0t14GBGrLeW+nHzvXFq6KLhrTIrQE53z40jPEE9c6Uunw5nQprwcakXWIjC6e+R9G xnSUk/0ZH9nbP2b4k7LLpSgaoEkTRdImaB8Sdmwo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732462AbgFPPs5 (ORCPT ); Tue, 16 Jun 2020 11:48:57 -0400 Received: from mail.kernel.org ([198.145.29.99]:43536 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732182AbgFPPsw (ORCPT ); Tue, 16 Jun 2020 11:48:52 -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 6FC0D2071A; Tue, 16 Jun 2020 15:48:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592322531; bh=DbtZOzDwdgv4mbBqVbgFRQDOuQC1dsbEesFDezdjZ1c=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iPDL5e4u1lJbMtWp6d9GdQAXorovlGZEVS+JqfeBjDQJAs4alzJdPHmFH0KU8ZwzO nlCSVfku5H+dryYNGCD/v+r+dAZKBt/XkEiCByTzNPy1z7FqGaeqz3D7mhgviz5Fpu a6WK0nKy7qUHO5tD94GD4c0qF3QVZEhDEuvJr5Kw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Juergen Gross , Stefano Stabellini , Boris Ostrovsky Subject: [PATCH 5.7 159/163] xen/pvcalls-back: test for errors when calling backend_connect() Date: Tue, 16 Jun 2020 17:35:33 +0200 Message-Id: <20200616153114.422889330@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: Juergen Gross commit c8d70a29d6bbc956013f3401f92a4431a9385a3c upstream. backend_connect() can fail, so switch the device to connected only if no error occurred. Fixes: 0a9c75c2c7258f2 ("xen/pvcalls: xenbus state handling") Cc: stable@vger.kernel.org Signed-off-by: Juergen Gross Link: https://lore.kernel.org/r/20200511074231.19794-1-jgross@suse.com Reviewed-by: Stefano Stabellini Signed-off-by: Boris Ostrovsky Signed-off-by: Greg Kroah-Hartman --- drivers/xen/pvcalls-back.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/drivers/xen/pvcalls-back.c +++ b/drivers/xen/pvcalls-back.c @@ -1088,7 +1088,8 @@ static void set_backend_state(struct xen case XenbusStateInitialised: switch (state) { case XenbusStateConnected: - backend_connect(dev); + if (backend_connect(dev)) + return; xenbus_switch_state(dev, XenbusStateConnected); break; case XenbusStateClosing: