diff options
| author | Michael Brown | 2007-10-04 15:46:56 +0200 |
|---|---|---|
| committer | Michael Brown | 2007-10-04 15:46:56 +0200 |
| commit | 2303c45d6503ef938ef8a75829116ff174ae7f09 (patch) | |
| tree | 87807ded2f22ef923b7f4a40d23858b7ac4e690a | |
| parent | Added more verbose memory-map debugging. (diff) | |
| download | ipxe-2303c45d6503ef938ef8a75829116ff174ae7f09.tar.gz ipxe-2303c45d6503ef938ef8a75829116ff174ae7f09.tar.xz ipxe-2303c45d6503ef938ef8a75829116ff174ae7f09.zip | |
Force a netdevice poll in net_tx() before attempting to transmit
packet, to work around the problem whereby small TX rings get backed
up because we haven't yet poll()ed for TX completions.
| -rw-r--r-- | src/net/netdevice.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/net/netdevice.c b/src/net/netdevice.c index 59a50205..f2778e88 100644 --- a/src/net/netdevice.c +++ b/src/net/netdevice.c @@ -424,6 +424,14 @@ struct net_device * find_netdev_by_location ( unsigned int bus_type, */ int net_tx ( struct io_buffer *iobuf, struct net_device *netdev, struct net_protocol *net_protocol, const void *ll_dest ) { + + /* Force a poll on the netdevice to (potentially) clear any + * backed-up TX completions. This is needed on some network + * devices to avoid excessive losses due to small TX ring + * sizes. + */ + netdev_poll ( netdev ); + return netdev->ll_protocol->tx ( iobuf, netdev, net_protocol, ll_dest ); } |