From patchwork Fri Jun 24 13:50:54 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= X-Patchwork-Id: 9197619 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 9FFD86075F for ; Fri, 24 Jun 2016 14:27:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 91CC1284B4 for ; Fri, 24 Jun 2016 14:27:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 869BD284B9; Fri, 24 Jun 2016 14:27:38 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 312FD284B4 for ; Fri, 24 Jun 2016 14:27:38 +0000 (UTC) Received: from localhost ([::1]:43887 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bGS53-0001xP-7a for patchwork-qemu-devel@patchwork.kernel.org; Fri, 24 Jun 2016 10:27:37 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54518) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bGRWB-0002P4-6e for qemu-devel@nongnu.org; Fri, 24 Jun 2016 09:51:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bGRW4-0006MX-2R for qemu-devel@nongnu.org; Fri, 24 Jun 2016 09:51:34 -0400 Received: from mx1.redhat.com ([209.132.183.28]:46794) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bGRW3-0006MT-T4 for qemu-devel@nongnu.org; Fri, 24 Jun 2016 09:51:28 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 691FB8553B; Fri, 24 Jun 2016 13:51:27 +0000 (UTC) Received: from localhost (ovpn-116-183.phx2.redhat.com [10.3.116.183]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u5ODpQx5016886; Fri, 24 Jun 2016 09:51:26 -0400 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Date: Fri, 24 Jun 2016 15:50:54 +0200 Message-Id: <20160624135110.17260-8-marcandre.lureau@redhat.com> In-Reply-To: <20160624135110.17260-1-marcandre.lureau@redhat.com> References: <20160624135110.17260-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Fri, 24 Jun 2016 13:51:27 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 07/23] vhost: make vhost_dev_cleanup() idempotent 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: yuanhan.liu@linux.intel.com, victork@redhat.com, mst@redhat.com, jonshin@cisco.com, mukawa@igel.co.jp, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Marc-André Lureau May be called on multiple code path, so it's easier to make it safe in the first place. Signed-off-by: Marc-André Lureau --- hw/virtio/vhost.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 9c8c9f8..1fdf109 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1085,19 +1085,27 @@ fail: void vhost_dev_cleanup(struct vhost_dev *hdev) { int i; + for (i = 0; i < hdev->nvqs; ++i) { vhost_virtqueue_cleanup(hdev->vqs + i); } - memory_listener_unregister(&hdev->memory_listener); + if (hdev->mem) { + /* those are only safe after successful init */ + memory_listener_unregister(&hdev->memory_listener); + QLIST_REMOVE(hdev, entry); + } if (hdev->migration_blocker) { migrate_del_blocker(hdev->migration_blocker); error_free(hdev->migration_blocker); } g_free(hdev->mem); g_free(hdev->mem_sections); - hdev->vhost_ops->vhost_backend_cleanup(hdev); + if (hdev->vhost_ops) { + hdev->vhost_ops->vhost_backend_cleanup(hdev); + } vhost_log_put(hdev, false); - QLIST_REMOVE(hdev, entry); + + memset(hdev, 0, sizeof(struct vhost_dev)); } /* Stop processing guest IO notifications in qemu.