From patchwork Fri Jun 2 15:01:43 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vladimir Sementsov-Ogievskiy X-Patchwork-Id: 770431 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (unknown [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3wfSKl4pRwz9s78 for ; Sat, 3 Jun 2017 01:09:15 +1000 (AEST) Received: from localhost ([::1]:50196 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dGoCE-0007Yl-Cx for incoming@patchwork.ozlabs.org; Fri, 02 Jun 2017 11:09:02 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35974) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dGo5Q-0001FU-H8 for qemu-devel@nongnu.org; Fri, 02 Jun 2017 11:02:01 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dGo5L-0002gA-PQ for qemu-devel@nongnu.org; Fri, 02 Jun 2017 11:02:00 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:34473 helo=relay.sw.ru) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dGo5L-0002ec-Dm for qemu-devel@nongnu.org; Fri, 02 Jun 2017 11:01:55 -0400 Received: from kvm.sw.ru (msk-vpn.virtuozzo.com [195.214.232.6]) by relay.sw.ru (8.13.4/8.13.4) with ESMTP id v52F1ocw008525; Fri, 2 Jun 2017 18:01:52 +0300 (MSK) From: Vladimir Sementsov-Ogievskiy To: qemu-devel@nongnu.org Date: Fri, 2 Jun 2017 18:01:43 +0300 Message-Id: <20170602150150.258222-6-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.11.1 In-Reply-To: <20170602150150.258222-1-vsementsov@virtuozzo.com> References: <20170602150150.258222-1-vsementsov@virtuozzo.com> X-detected-operating-system: by eggs.gnu.org: OpenBSD 3.x [fuzzy] X-Received-From: 195.214.232.25 Subject: [Qemu-devel] [PATCH v2 05/12] nbd/server: refactor nbd_co_send_reply X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, vsementsov@virtuozzo.com, den@openvz.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" As nbd_write never returns value > 0, we can get rid of extra ret. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Eric Blake --- nbd/server.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/nbd/server.c b/nbd/server.c index 8985df86b4..dd6b241761 100644 --- a/nbd/server.c +++ b/nbd/server.c @@ -972,7 +972,7 @@ void nbd_export_close_all(void) static int nbd_co_send_reply(NBDRequestData *req, NBDReply *reply, int len) { NBDClient *client = req->client; - int rc, ret; + int rc; g_assert(qemu_in_coroutine()); qemu_co_mutex_lock(&client->send_lock); @@ -983,9 +983,9 @@ static int nbd_co_send_reply(NBDRequestData *req, NBDReply *reply, int len) } else { qio_channel_set_cork(client->ioc, true); rc = nbd_send_reply(client->ioc, reply); - if (rc >= 0) { - ret = nbd_write(client->ioc, req->data, len, NULL); - if (ret < 0) { + if (rc == 0) { + rc = nbd_write(client->ioc, req->data, len, NULL); + if (rc < 0) { rc = -EIO; } }