Merge remote-tracking branches 'spi/fix/ath79', 'spi/fix/atmel', 'spi/fix/coldfire...

[~andy/linux] / drivers / net / xen-netback / netback.c

diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c
index 6b62c3eb8e181411ab8508828ab1bacbb465d26a..e5284bca2d90e6e80ec0d682475404e9dc236e33 100644 (file)
--- a/drivers/net/xen-netback/netback.c
+++ b/drivers/net/xen-netback/netback.c
@@ -476,7 +476,6 @@ static void xenvif_rx_action(struct xenvif *vif)
        unsigned long offset;
        struct skb_cb_overlay *sco;
        bool need_to_notify = false;
-       bool ring_full = false;
 
        struct netrx_pending_operations npo = {
                .copy  = vif->grant_copy_op,
@@ -486,7 +485,7 @@ static void xenvif_rx_action(struct xenvif *vif)
        skb_queue_head_init(&rxq);
 
        while ((skb = skb_dequeue(&vif->rx_queue)) != NULL) {
-               int max_slots_needed;
+               RING_IDX max_slots_needed;
                int i;
 
                /* We need a cheap worse case estimate for the number of
@@ -509,9 +508,10 @@ static void xenvif_rx_action(struct xenvif *vif)
                if (!xenvif_rx_ring_slots_available(vif, max_slots_needed)) {
                        skb_queue_head(&vif->rx_queue, skb);
                        need_to_notify = true;
-                       ring_full = true;
+                       vif->rx_last_skb_slots = max_slots_needed;
                        break;
-               }
+               } else
+                       vif->rx_last_skb_slots = 0;
 
                sco = (struct skb_cb_overlay *)skb->cb;
                sco->meta_slots_used = xenvif_gop_skb(skb, &npo);
@@ -522,8 +522,6 @@ static void xenvif_rx_action(struct xenvif *vif)
 
        BUG_ON(npo.meta_prod > ARRAY_SIZE(vif->meta));
 
-       vif->rx_queue_stopped = !npo.copy_prod && ring_full;
-
        if (!npo.copy_prod)
                goto done;
 
@@ -1473,8 +1471,8 @@ static struct xen_netif_rx_response *make_rx_response(struct xenvif *vif,
 
 static inline int rx_work_todo(struct xenvif *vif)
 {
-       return (!skb_queue_empty(&vif->rx_queue) && !vif->rx_queue_stopped) ||
-               vif->rx_event;
+       return !skb_queue_empty(&vif->rx_queue) &&
+              xenvif_rx_ring_slots_available(vif, vif->rx_last_skb_slots);
 }
 
 static inline int tx_work_todo(struct xenvif *vif)
@@ -1560,8 +1558,6 @@ int xenvif_kthread(void *data)
                if (!skb_queue_empty(&vif->rx_queue))
                        xenvif_rx_action(vif);
 
-               vif->rx_event = false;
-
                if (skb_queue_empty(&vif->rx_queue) &&
                    netif_queue_stopped(vif->dev))
                        xenvif_start_queue(vif);