[dpdk-dev] [PATCH] cast used->idx to volatile

[linhaifeng]

From: Linhaifeng <haifeng.lin at huawei.com>

Same as rte_vhost_enqueue_burst we should cast used->idx
to volatile before notify guest.

Signed-off-by: Linhaifeng <haifeng.lin at huawei.com>
---
 lib/librte_vhost/vhost_rxtx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/librte_vhost/vhost_rxtx.c b/lib/librte_vhost/vhost_rxtx.c
index 535c7a1..8d674d1 100644
--- a/lib/librte_vhost/vhost_rxtx.c
+++ b/lib/librte_vhost/vhost_rxtx.c
@@ -722,7 +722,7 @@ rte_vhost_dequeue_burst(struct virtio_net *dev, uint16_t queue_id,
 	}
 
 	rte_compiler_barrier();
-	vq->used->idx += entry_success;
+	*(volatile uint16_t *)&vq->used->idx += entry_success;
 	/* Kick guest if required. */
 	if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT))
 		eventfd_write((int)vq->callfd, 1);
-- 
1.8.5.2.msysgit.0