From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753228AbdGSIzC (ORCPT ); Wed, 19 Jul 2017 04:55:02 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39468 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751548AbdGSIy7 (ORCPT ); Wed, 19 Jul 2017 04:54:59 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 9E51E7A16E Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=jasowang@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 9E51E7A16E From: Jason Wang To: mst@redhat.com, virtualization@lists.linux-foundation.org, jasowang@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH net-next V2 1/5] virtio_ring: allow to store zero as the ctx Date: Wed, 19 Jul 2017 16:54:45 +0800 Message-Id: <1500454489-16805-2-git-send-email-jasowang@redhat.com> In-Reply-To: <1500454489-16805-1-git-send-email-jasowang@redhat.com> References: <1500454489-16805-1-git-send-email-jasowang@redhat.com> X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Wed, 19 Jul 2017 08:54:58 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Allow zero to be store as a ctx, with this we could store e.g zero value which could be meaningful for the case of storing headroom through ctx. Signed-off-by: Jason Wang --- drivers/virtio/virtio_ring.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 5e1b548..9aaa177 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -391,7 +391,7 @@ static inline int virtqueue_add(struct virtqueue *_vq, vq->desc_state[head].data = data; if (indirect) vq->desc_state[head].indir_desc = desc; - if (ctx) + else vq->desc_state[head].indir_desc = ctx; /* Put entry in available array (but don't update avail->idx until they -- 2.7.4