From patchwork Mon May 16 21:05:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Eric Blake X-Patchwork-Id: 12851532 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1D162C433F5 for ; Mon, 16 May 2022 22:15:31 +0000 (UTC) Received: from localhost ([::1]:41124 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nqizy-0000YM-1S for qemu-devel@archiver.kernel.org; Mon, 16 May 2022 18:15:30 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33658) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nqhuI-0003s5-GI for qemu-devel@nongnu.org; Mon, 16 May 2022 17:05:35 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:58482) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nqhuF-0000Mk-3o for qemu-devel@nongnu.org; Mon, 16 May 2022 17:05:32 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1652735128; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=e8PAD/llK1gB9vId31uIa7olnIuZCrjH2aDtrKBSRwI=; b=EPU0szTLdcLwIAPdHtVUI6veT7+8bMMfVNDEU5lNg/9/ejx/Ku+Z/H4Ln1ebnwI21p+Yef kWicvjSQErNL+lKOhuWBEXmc78C+fnsd+UFZvGxlQgDYMZtRCwWLYOsw7ujyLRkuy1tVBo XTge75TE01DRMiDRZVgCRPB80ID32vg= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-44-5RS5ijZIPp2LrhdMAxMltA-1; Mon, 16 May 2022 17:05:25 -0400 X-MC-Unique: 5RS5ijZIPp2LrhdMAxMltA-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 3B04D100BAAB; Mon, 16 May 2022 21:05:24 +0000 (UTC) Received: from blue.redhat.com (unknown [10.2.17.49]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8C0DA401E77; Mon, 16 May 2022 21:05:23 +0000 (UTC) From: Eric Blake To: qemu-devel@nongnu.org Cc: Peter Maydell , Vladimir Sementsov-Ogievskiy , Kevin Wolf , Hanna Reitz , qemu-block@nongnu.org (open list:Network Block Dev...) Subject: [PATCH] nbd: Drop dead code spotted by Coverity Date: Mon, 16 May 2022 16:05:19 -0500 Message-Id: <20220516210519.76135-1-eblake@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 Received-SPF: pass client-ip=170.10.133.124; envelope-from=eblake@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" CID 1488362 points out that the second 'rc >= 0' check is now dead code. Reported-by: Peter Maydell Fixes: 172f5f1a40(nbd: remove peppering of nbd_client_connected) Signed-off-by: Eric Blake Reviewed-by: Peter Maydell Reviewed-by: Vladimir Sementsov-Ogievskiy --- block/nbd.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/block/nbd.c b/block/nbd.c index 6085ab1d2c..7f5f50ec46 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -521,12 +521,8 @@ static int coroutine_fn nbd_co_send_request(BlockDriverState *bs, if (qiov) { qio_channel_set_cork(s->ioc, true); rc = nbd_send_request(s->ioc, request); - if (rc >= 0) { - if (qio_channel_writev_all(s->ioc, qiov->iov, qiov->niov, - NULL) < 0) { - rc = -EIO; - } - } else if (rc >= 0) { + if (rc >= 0 && qio_channel_writev_all(s->ioc, qiov->iov, qiov->niov, + NULL) < 0) { rc = -EIO; } qio_channel_set_cork(s->ioc, false);