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authorPaolo Bonzini <pbonzini@redhat.com>2013-04-08 15:32:07 +0200
committerRusty Russell <rusty@rustcorp.com.au>2013-04-08 15:36:53 +0200
commit10f34f64d3a50912ae49c67c08c9162effdf546a (patch)
tree0f5bfa34fdd3f94670362affa42720b03aedee4c /drivers/scsi/virtio_scsi.c
parentvirtio-scsi: pass struct virtio_scsi to virtqueue completion function (diff)
downloadlinux-10f34f64d3a50912ae49c67c08c9162effdf546a.tar.xz
linux-10f34f64d3a50912ae49c67c08c9162effdf546a.zip
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>
Diffstat (limited to 'drivers/scsi/virtio_scsi.c')
-rw-r--r--drivers/scsi/virtio_scsi.c22
1 files changed, 9 insertions, 13 deletions
diff --git a/drivers/scsi/virtio_scsi.c b/drivers/scsi/virtio_scsi.c
index c23560c6a32e..dc2daec9a10d 100644
--- 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);
};
/**