From patchwork Tue Jun 16 15:35:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 224341 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 76491C433E0 for ; Tue, 16 Jun 2020 16:15:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4C35E2071A for ; Tue, 16 Jun 2020 16:15:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592324141; bh=d97WpFy+5OREEuxVaheOyuxtpt3chE+sXqbZmAI3iho=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=SaDZ7zb3sRjRQBj47P1tqnhPnP1IIg+dc7bdio8n9KGJXMSNh9JlcCMl9GxaeejEt lkMfXH/at/+IjqRxJQCp0oZadzo+US7tzsWq/hpH0sm1xTku2ev7OCDstdT/xPxsXh 0HZfKUE1oKR9Ur9dBkqnm3qWIZUvyYpQ/oC6Mh8I= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731465AbgFPPld (ORCPT ); Tue, 16 Jun 2020 11:41:33 -0400 Received: from mail.kernel.org ([198.145.29.99]:57356 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730575AbgFPPld (ORCPT ); Tue, 16 Jun 2020 11:41:33 -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 4F631208E4; Tue, 16 Jun 2020 15:41:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592322092; bh=d97WpFy+5OREEuxVaheOyuxtpt3chE+sXqbZmAI3iho=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SctYqyZ3sqWsg1If4Z1gnMOJRfC/ZKNYKRS+8cROMMn0TdKwnXrET33o0C5415HPg UDS5QaBYHjV6fI4+alEP8DAH5BlNYUPAxu9WdbUmJrDY+XUUC8rD5EXXJtk+nJnWyX XR8wF2JRZSDCW6WUUXuH6iRblZcp1PqUtGnooIKc= 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 5.4 132/134] xen/pvcalls-back: test for errors when calling backend_connect() Date: Tue, 16 Jun 2020 17:35:16 +0200 Message-Id: <20200616153107.109738183@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200616153100.633279950@linuxfoundation.org> References: <20200616153100.633279950@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@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 @@ -1087,7 +1087,8 @@ 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: