From patchwork Tue Jul 10 09:31:04 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Wei W" X-Patchwork-Id: 10516761 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 925F46032A for ; Tue, 10 Jul 2018 09:58:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 835E028BAD for ; Tue, 10 Jul 2018 09:58:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 76F9828BBB; Tue, 10 Jul 2018 09:58:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 2AB7928BAD for ; Tue, 10 Jul 2018 09:58:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752464AbeGJJ4z (ORCPT ); Tue, 10 Jul 2018 05:56:55 -0400 Received: from mga18.intel.com ([134.134.136.126]:6916 "EHLO mga18.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751903AbeGJJ4y (ORCPT ); Tue, 10 Jul 2018 05:56:54 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 10 Jul 2018 02:56:53 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,334,1526367600"; d="scan'208";a="73598568" Received: from devel-ww.sh.intel.com ([10.239.48.110]) by orsmga002.jf.intel.com with ESMTP; 10 Jul 2018 02:56:30 -0700 From: Wei Wang To: virtio-dev@lists.oasis-open.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, kvm@vger.kernel.org, linux-mm@kvack.org, mst@redhat.com, mhocko@kernel.org, akpm@linux-foundation.org Cc: torvalds@linux-foundation.org, pbonzini@redhat.com, wei.w.wang@intel.com, liliang.opensource@gmail.com, yang.zhang.wz@gmail.com, quan.xu0@gmail.com, nilal@redhat.com, riel@redhat.com, peterx@redhat.com Subject: [PATCH v35 2/5] virtio-balloon: remove BUG() in init_vqs Date: Tue, 10 Jul 2018 17:31:04 +0800 Message-Id: <1531215067-35472-3-git-send-email-wei.w.wang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1531215067-35472-1-git-send-email-wei.w.wang@intel.com> References: <1531215067-35472-1-git-send-email-wei.w.wang@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP It's a bit overkill to use BUG when failing to add an entry to the stats_vq in init_vqs. So remove it and just return the error to the caller to bail out nicely. Signed-off-by: Wei Wang Cc: Michael S. Tsirkin --- drivers/virtio/virtio_balloon.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 6b237e3..9356a1a 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -455,9 +455,13 @@ static int init_vqs(struct virtio_balloon *vb) num_stats = update_balloon_stats(vb); sg_init_one(&sg, vb->stats, sizeof(vb->stats[0]) * num_stats); - if (virtqueue_add_outbuf(vb->stats_vq, &sg, 1, vb, GFP_KERNEL) - < 0) - BUG(); + err = virtqueue_add_outbuf(vb->stats_vq, &sg, 1, vb, + GFP_KERNEL); + if (err) { + dev_warn(&vb->vdev->dev, "%s: add stat_vq failed\n", + __func__); + return err; + } virtqueue_kick(vb->stats_vq); } return 0;