Merge tag 'vexpress-for-v4.6/dt-updates-2' of git://git.kernel.org/pub/scm/linux...

[cascardo/linux.git] / drivers / net / xen-netfront.c

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index d6abf19..96ccd4e 100644 (file)
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -364,6 +364,7 @@ static void xennet_tx_buf_gc(struct netfront_queue *queue)
        RING_IDX cons, prod;
        unsigned short id;
        struct sk_buff *skb;
+       bool more_to_do;
 
        BUG_ON(!netif_carrier_ok(queue->info->netdev));
 
@@ -398,18 +399,8 @@ static void xennet_tx_buf_gc(struct netfront_queue *queue)
 
                queue->tx.rsp_cons = prod;
 
-               /*
-                * Set a new event, then check for race with update of tx_cons.
-                * Note that it is essential to schedule a callback, no matter
-                * how few buffers are pending. Even if there is space in the
-                * transmit ring, higher layers may be blocked because too much
-                * data is outstanding: in such cases notification from Xen is
-                * likely to be the only kick that we'll get.
-                */
-               queue->tx.sring->rsp_event =
-                       prod + ((queue->tx.sring->req_prod - prod) >> 1) + 1;
-               mb();           /* update shared area */
-       } while ((cons == prod) && (prod != queue->tx.sring->rsp_prod));
+               RING_FINAL_CHECK_FOR_RESPONSES(&queue->tx, more_to_do);
+       } while (more_to_do);
 
        xennet_maybe_wake_tx(queue);
 }