From patchwork Thu May 5 15:08:04 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Michael S. Tsirkin" X-Patchwork-Id: 757422 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id p45F9m5S009284 for ; Thu, 5 May 2011 15:09:48 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754841Ab1EEPJL (ORCPT ); Thu, 5 May 2011 11:09:11 -0400 Received: from mx1.redhat.com ([209.132.183.28]:14807 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753510Ab1EEPJH (ORCPT ); Thu, 5 May 2011 11:09:07 -0400 Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id p45F8Kwr019613 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 5 May 2011 11:08:20 -0400 Received: from redhat.com (vpn1-6-209.ams2.redhat.com [10.36.6.209]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with SMTP id p45F8E1S028274; Thu, 5 May 2011 11:08:15 -0400 Date: Thu, 5 May 2011 18:08:04 +0300 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: Rusty Russell , Carsten Otte , Christian Borntraeger , linux390@de.ibm.com, Martin Schwidefsky , Heiko Carstens , Shirley Ma , lguest@lists.ozlabs.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, Krishna Kumar , Tom Lendacky , steved@us.ibm.com, habanero@linux.vnet.ibm.com Subject: [PATCH 1/3] virtio: fix avail event support Message-ID: <1d1d5b1a8d5326dae23685587e6ab84fc6b7177e.1304605816.git.mst@redhat.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Mutt-Fcc: =sent User-Agent: Mutt/1.5.21 (2010-09-15) X-Scanned-By: MIMEDefang 2.67 on 10.5.11.11 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Thu, 05 May 2011 15:09:48 +0000 (UTC) make valid flag false, not true, on overrun Reported-by: Tom Lendacky Signed-off-by: Michael S. Tsirkin --- drivers/virtio/virtio_ring.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 57bf9d5..0ea0781 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -242,7 +242,7 @@ add_head: * kicked_avail index we stored. TODO: make sure all drivers * kick at least once in 2^16 and remove this. */ if (unlikely(vq->vring.avail->idx == vq->kicked_avail)) - vq->kicked_avail_valid = true; + vq->kicked_avail_valid = false; pr_debug("Added buffer head %i to %p\n", head, vq); END_USE(vq);