diff options
Diffstat (limited to 'drivers/net/ibmveth.c')
| -rw-r--r-- | drivers/net/ibmveth.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c index c04957a7df7d..6ec3d500f334 100644 --- a/drivers/net/ibmveth.c +++ b/drivers/net/ibmveth.c @@ -915,17 +915,36 @@ static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) { struct ibmveth_adapter *adapter = dev->priv; int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; - int i; + int reinit = 0; + int i, rc; if (new_mtu < IBMVETH_MAX_MTU) return -EINVAL; + for (i = 0; i < IbmVethNumBufferPools; i++) + if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) + break; + + if (i == IbmVethNumBufferPools) + return -EINVAL; + /* Look for an active buffer pool that can hold the new MTU */ for(i = 0; i<IbmVethNumBufferPools; i++) { - if (!adapter->rx_buff_pool[i].active) - continue; + if (!adapter->rx_buff_pool[i].active) { + adapter->rx_buff_pool[i].active = 1; + reinit = 1; + } + if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { - dev->mtu = new_mtu; + if (reinit && netif_running(adapter->netdev)) { + adapter->pool_config = 1; + ibmveth_close(adapter->netdev); + adapter->pool_config = 0; + dev->mtu = new_mtu; + if ((rc = ibmveth_open(adapter->netdev))) + return rc; + } else + dev->mtu = new_mtu; return 0; } } |