From patchwork Thu Jul 29 07:34:56 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yongji Xie X-Patchwork-Id: 12407965 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,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 51130C4320A for ; Thu, 29 Jul 2021 07:37:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34C1C61076 for ; Thu, 29 Jul 2021 07:37:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235325AbhG2HhN (ORCPT ); Thu, 29 Jul 2021 03:37:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46800 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235354AbhG2Hg7 (ORCPT ); Thu, 29 Jul 2021 03:36:59 -0400 Received: from mail-pl1-x62a.google.com (mail-pl1-x62a.google.com [IPv6:2607:f8b0:4864:20::62a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 40ED5C0617A3 for ; Thu, 29 Jul 2021 00:36:51 -0700 (PDT) Received: by mail-pl1-x62a.google.com with SMTP id c16so5944659plh.7 for ; Thu, 29 Jul 2021 00:36:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=LsGekY4BvYvIO5Z8AgcJapYB7A/KQEKxuOgJFJnV+F0=; b=X98+TJ5q20fVVP7OZ9n9veXNRWtBaNyF7u49KUNkAM08u5ecR/X2DKDwo1Z3kXSnog AkIvxsuc6X/gsU10vyjL8G4S48EXGasvxyUvBWTz/n2nYXpvsiABp2BBpcAxzMKlc9JC tZHpDQJRdciKCGBbNBWxs2uv+1TVCUY4XPFmsIqsbkO+YVLO26aR4jONl8t2P20X7aov 2MxYGwbbV4OrGtS6am9b0pJn4afscft59CPUq0kj0zGDJRQnHkTNskX287DpmE2RFfUV TaJlG/0ITl45C5ABu2t/JY8+gPqs+Fpn2oPnqG672GSOWOJqgTtAC/jfy64aWdz90uPG HNQQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=LsGekY4BvYvIO5Z8AgcJapYB7A/KQEKxuOgJFJnV+F0=; b=tmtGdWuctrcItcDTfyMMD+5hGruW4ZVk7D3YvQE396Qa0dsHishXNDzVeQTKLKDeA6 L+Xnq0YrUCO5j/1JEtrhKumTwMEESuk9Skw1R8EXfm6IeNrhUxoaOZmVqHPq9zKgChMk 4bZFX200jILBoRgAScchyxq2Ig/pqKmey08jdl+cLeOX2EXCs8WBrKXUkuZoVXKfM6/J b0CQmFN6ZqMykMzUdOoKwPRoJ9s5VF0jns/mo3EnJPr60LsIgnAmqLFpCk+aT35/ZkR7 QrtNAij0IwS+KhA1+K5rrsMC6jkdmMLXFzn0Lqe0eLf3tUS2hMClrmWUJ/CLe2V/+dUs i3HQ== X-Gm-Message-State: AOAM531dM6vCS4ZHYsfYv6/yxBMJeBmn6Hb7p1j+r7cTGrjNBvTAKpth UYGUrG1Jenq3E3Cv3QXmHauT X-Google-Smtp-Source: ABdhPJwjSVfLNS2GDfIx/eWaUI7/WEDOXCiXXfI318zMm7E6oJfs9FrWN4b/fDb28gHcKZEreTjMkA== X-Received: by 2002:a17:90a:5101:: with SMTP id t1mr13696042pjh.107.1627544210785; Thu, 29 Jul 2021 00:36:50 -0700 (PDT) Received: from localhost ([139.177.225.253]) by smtp.gmail.com with ESMTPSA id s3sm2487674pfk.61.2021.07.29.00.36.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Jul 2021 00:36:50 -0700 (PDT) From: Xie Yongji To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, hch@infradead.org, christian.brauner@canonical.com, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net, mika.penttila@nextfour.com, dan.carpenter@oracle.com, joro@8bytes.org, gregkh@linuxfoundation.org, zhe.he@windriver.com, xiaodong.liu@intel.com, joe@perches.com Cc: songmuchun@bytedance.com, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-fsdevel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v10 10/17] virtio: Handle device reset failure in register_virtio_device() Date: Thu, 29 Jul 2021 15:34:56 +0800 Message-Id: <20210729073503.187-11-xieyongji@bytedance.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210729073503.187-1-xieyongji@bytedance.com> References: <20210729073503.187-1-xieyongji@bytedance.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org The device reset may fail in virtio-vdpa case now, so add checks to its return value and fail the register_virtio_device(). Signed-off-by: Xie Yongji --- drivers/virtio/virtio.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/drivers/virtio/virtio.c b/drivers/virtio/virtio.c index a15beb6b593b..8df75425fb43 100644 --- a/drivers/virtio/virtio.c +++ b/drivers/virtio/virtio.c @@ -349,7 +349,9 @@ int register_virtio_device(struct virtio_device *dev) /* We always start by resetting the device, in case a previous * driver messed it up. This also tests that code path a little. */ - dev->config->reset(dev); + err = dev->config->reset(dev); + if (err) + goto err_reset; /* Acknowledge that we've seen the device. */ virtio_add_status(dev, VIRTIO_CONFIG_S_ACKNOWLEDGE); @@ -362,10 +364,13 @@ int register_virtio_device(struct virtio_device *dev) */ err = device_add(&dev->dev); if (err) - ida_simple_remove(&virtio_index_ida, dev->index); -out: - if (err) - virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED); + goto err_add; + + return 0; +err_add: + virtio_add_status(dev, VIRTIO_CONFIG_S_FAILED); +err_reset: + ida_simple_remove(&virtio_index_ida, dev->index); return err; } EXPORT_SYMBOL_GPL(register_virtio_device);