net/virtio: add interrupt helper for split ring

Add a helper for disabling interrupts in split ring to make the
code consistent with the corresponding code in packed ring.

Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Jens Freimann <jfreimann@redhat.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>

diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h
index 6dab7db..5cea7cb 100644 (file)
--- a/drivers/net/virtio/virtqueue.h
+++ b/drivers/net/virtio/virtqueue.h
@@ -317,7 +317,7 @@ vring_desc_init_split(struct vring_desc *dp, uint16_t n)
 }
 
 /**
- * Tell the backend not to interrupt us.
+ * Tell the backend not to interrupt us. Implementation for packed virtqueues.
  */
 static inline void
 virtqueue_disable_intr_packed(struct virtqueue *vq)
@@ -329,6 +329,15 @@ virtqueue_disable_intr_packed(struct virtqueue *vq)
        }
 }
 
+/**
+ * Tell the backend not to interrupt us. Implementation for split virtqueues.
+ */
+static inline void
+virtqueue_disable_intr_split(struct virtqueue *vq)
+{
+       vq->vq_split.ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
+}
+
 /**
  * Tell the backend not to interrupt us.
  */
@@ -338,7 +347,7 @@ virtqueue_disable_intr(struct virtqueue *vq)
        if (vtpci_packed_queue(vq->hw))
                virtqueue_disable_intr_packed(vq);
        else
-               vq->vq_split.ring.avail->flags |= VRING_AVAIL_F_NO_INTERRUPT;
+               virtqueue_disable_intr_split(vq);
 }
 
 /**