diff --git a/drivers/net/xen-netback/rx.c b/drivers/net/xen-netback/rx.c
index 9b62f65b630e..48e2006f96ce 100644
--- a/drivers/net/xen-netback/rx.c
+++ b/drivers/net/xen-netback/rx.c
@@ -38,10 +38,15 @@ static bool xenvif_rx_ring_slots_available(struct xenvif_queue *queue)
 	RING_IDX prod, cons;
 	struct sk_buff *skb;
 	int needed;
+	unsigned long flags;
+
+	spin_lock_irqsave(&queue->rx_queue.lock, flags);
 
 	skb = skb_peek(&queue->rx_queue);
-	if (!skb)
+	if (!skb) {
+		spin_unlock_irqrestore(&queue->rx_queue.lock, flags);
 		return false;
+	}
 
 	needed = DIV_ROUND_UP(skb->len, XEN_PAGE_SIZE);
 	if (skb_is_gso(skb))
@@ -49,6 +54,8 @@ static bool xenvif_rx_ring_slots_available(struct xenvif_queue *queue)
 	if (skb->sw_hash)
 		needed++;
 
+	spin_unlock_irqrestore(&queue->rx_queue.lock, flags);
+
 	do {
 		prod = queue->rx.sring->req_prod;
 		cons = queue->rx.req_cons;