diff options
Diffstat (limited to 'src/drivers/net/netfront.c')
| -rw-r--r-- | src/drivers/net/netfront.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/src/drivers/net/netfront.c b/src/drivers/net/netfront.c index 2f4bbf2a..b6205542 100644 --- a/src/drivers/net/netfront.c +++ b/src/drivers/net/netfront.c @@ -511,15 +511,12 @@ static void netfront_refill_rx ( struct net_device *netdev ) { struct xen_device *xendev = netfront->xendev; struct io_buffer *iobuf; struct netif_rx_request *request; + unsigned int refilled = 0; int notify; int rc; - /* Do nothing if ring is already full */ - if ( netfront_ring_is_full ( &netfront->rx ) ) - return; - /* Refill ring */ - do { + while ( netfront_ring_fill ( &netfront->rx ) < NETFRONT_RX_FILL ) { /* Allocate I/O buffer */ iobuf = alloc_iob ( PAGE_SIZE ); @@ -543,13 +540,17 @@ static void netfront_refill_rx ( struct net_device *netdev ) { /* Move to next descriptor */ netfront->rx_fring.req_prod_pvt++; + refilled++; - } while ( ! netfront_ring_is_full ( &netfront->rx ) ); + } /* Push new descriptors and notify backend if applicable */ - RING_PUSH_REQUESTS_AND_CHECK_NOTIFY ( &netfront->rx_fring, notify ); - if ( notify ) - netfront_send_event ( netfront ); + if ( refilled ) { + RING_PUSH_REQUESTS_AND_CHECK_NOTIFY ( &netfront->rx_fring, + notify ); + if ( notify ) + netfront_send_event ( netfront ); + } } /** |