As desc_is_used has a load-acquire or rte_io_rmb inside
and wait for used desc in virtqueue, it is ok to remove
virtio_rmb behind it.
Signed-off-by: Joyce Kong <joyce.k...@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.w...@arm.com>
---
drivers/net/virtio/virtio_ethdev.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/net/virtio/virtio_ethdev.c
b/drivers/net/virtio/virtio_ethdev.c
index 6c233b75b..0d91f7a50 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -209,12 +209,12 @@ virtio_send_command_packed(struct virtnet_ctl *cvq,
virtio_wmb(vq->hw->weak_barriers);
virtqueue_notify(vq);
- /* wait for used descriptors in virtqueue */
+ /* wait for used desc in virtqueue
+ * desc_is_used has a load-acquire or rte_io_rmb inside
+ */
while (!desc_is_used(&desc[head], vq))
usleep(100);
- virtio_rmb(vq->hw->weak_barriers);
-
/* now get used descriptors */
vq->vq_free_cnt += nb_descs;
vq->vq_used_cons_idx += nb_descs;
--
2.29.2
