From patchwork Mon Mar 11 02:44:00 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wanlong Gao X-Patchwork-Id: 2246321 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 87A874020C for ; Mon, 11 Mar 2013 02:43:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753899Ab3CKCmk (ORCPT ); Sun, 10 Mar 2013 22:42:40 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:7626 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1753820Ab3CKCmh (ORCPT ); Sun, 10 Mar 2013 22:42:37 -0400 X-IronPort-AV: E=Sophos;i="4.84,820,1355068800"; d="scan'208";a="6847257" Received: from unknown (HELO tang.cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 11 Mar 2013 10:40:08 +0800 Received: from fnstmail02.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id r2B2gW3O007627; Mon, 11 Mar 2013 10:42:33 +0800 Received: from gaowanlong.fnst.cn.fujitsu.com ([10.167.233.84]) by fnstmail02.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.3) with ESMTP id 2013031110412195-744583 ; Mon, 11 Mar 2013 10:41:21 +0800 From: Wanlong Gao To: linux-kernel@vger.kernel.org Cc: rusty@rustcorp.com.au, mst@redhat.com, asias@redhat.com, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, linux-scsi@vger.kernel.org, JBottomley@parallels.com, pbonzini@redhat.com, Wanlong Gao Subject: [PATCH V4 3/5] virtio-scsi: push vq lock/unlock into virtscsi_vq_done Date: Mon, 11 Mar 2013 10:44:00 +0800 Message-Id: <1362969842-9145-4-git-send-email-gaowanlong@cn.fujitsu.com> X-Mailer: git-send-email 1.8.2.rc2 In-Reply-To: <1362969842-9145-1-git-send-email-gaowanlong@cn.fujitsu.com> References: <1362969842-9145-1-git-send-email-gaowanlong@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/03/11 10:41:21, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/03/11 10:41:23, Serialize complete at 2013/03/11 10:41:23 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Paolo Bonzini Avoid duplicated code in all of the callers. Cc: linux-scsi@vger.kernel.org Signed-off-by: Paolo Bonzini Signed-off-by: Wanlong Gao --- drivers/scsi/virtio_scsi.c | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-) diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c index fdb0132..3573704 100644 --- a/drivers/scsi/virtio_scsi.c +++ b/drivers/scsi/virtio_scsi.c @@ -167,28 +167,30 @@ static void virtscsi_complete_cmd(struct virtio_scsi *vscsi, void *buf) sc->scsi_done(sc); } -static void virtscsi_vq_done(struct virtio_scsi *vscsi, struct virtqueue *vq, +static void virtscsi_vq_done(struct virtio_scsi *vscsi, + struct virtio_scsi_vq *virtscsi_vq, void (*fn)(struct virtio_scsi *vscsi, void *buf)) { void *buf; unsigned int len; + unsigned long flags; + struct virtqueue *vq = virtscsi_vq->vq; + spin_lock_irqsave(&virtscsi_vq->vq_lock, flags); do { virtqueue_disable_cb(vq); while ((buf = virtqueue_get_buf(vq, &len)) != NULL) fn(vscsi, buf); } while (!virtqueue_enable_cb(vq)); + spin_unlock_irqrestore(&virtscsi_vq->vq_lock, flags); } static void virtscsi_req_done(struct virtqueue *vq) { struct Scsi_Host *sh = virtio_scsi_host(vq->vdev); struct virtio_scsi *vscsi = shost_priv(sh); - unsigned long flags; - spin_lock_irqsave(&vscsi->req_vq.vq_lock, flags); - virtscsi_vq_done(vscsi, vq, virtscsi_complete_cmd); - spin_unlock_irqrestore(&vscsi->req_vq.vq_lock, flags); + virtscsi_vq_done(vscsi, &vscsi->req_vq, virtscsi_complete_cmd); }; static void virtscsi_complete_free(struct virtio_scsi *vscsi, void *buf) @@ -205,11 +207,8 @@ static void virtscsi_ctrl_done(struct virtqueue *vq) { struct Scsi_Host *sh = virtio_scsi_host(vq->vdev); struct virtio_scsi *vscsi = shost_priv(sh); - unsigned long flags; - spin_lock_irqsave(&vscsi->ctrl_vq.vq_lock, flags); - virtscsi_vq_done(vscsi, vq, virtscsi_complete_free); - spin_unlock_irqrestore(&vscsi->ctrl_vq.vq_lock, flags); + virtscsi_vq_done(vscsi, &vscsi->ctrl_vq, virtscsi_complete_free); }; static int virtscsi_kick_event(struct virtio_scsi *vscsi, @@ -344,11 +343,8 @@ static void virtscsi_event_done(struct virtqueue *vq) { struct Scsi_Host *sh = virtio_scsi_host(vq->vdev); struct virtio_scsi *vscsi = shost_priv(sh); - unsigned long flags; - spin_lock_irqsave(&vscsi->event_vq.vq_lock, flags); - virtscsi_vq_done(vscsi, vq, virtscsi_complete_event); - spin_unlock_irqrestore(&vscsi->event_vq.vq_lock, flags); + virtscsi_vq_done(vscsi, &vscsi->event_vq, virtscsi_complete_event); }; /**