virtio-scsi: push vq lock/unlock into virtscsi_vq_done

Avoid duplicated code in all of the callers.

Cc: linux-scsi@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Reviewed-by: Asias He <asias@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index c23560c..dc2daec 100644 (file)
--- a/drivers/scsi/virtio_scsi.c
+++ b/drivers/scsi/virtio_scsi.c
@@ -165,28 +165,30 @@ 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)
@@ -203,11 +205,8 @@ 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,
@@ -342,11 +341,8 @@ 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);
 };
 
 /**