static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
{
struct ibmveth_adapter *adapter = netdev_priv(dev);
struct vio_dev *viodev = adapter->vdev;
int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
int i;
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;
for (i = 0; i < IbmVethNumBufferPools; i++)
if (adapter->rx_buff_pool[i].active) {
ibmveth_free_buffer_pool(adapter,
&adapter->rx_buff_pool[i]);
adapter->rx_buff_pool[i].active = 0;
}
for(i = 0; i<IbmVethNumBufferPools; i++) {
adapter->rx_buff_pool[i].active = 1;
if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
if (netif_running(adapter->netdev)) {
adapter->pool_config = 1;
ibmveth_close(adapter->netdev);
adapter->pool_config = 0;
dev->mtu = new_mtu;
vio_cmo_set_dev_desired(viodev,
ibmveth_get_desired_dma
(viodev));
return ibmveth_open(adapter->netdev);
}
dev->mtu = new_mtu;
vio_cmo_set_dev_desired(viodev,
ibmveth_get_desired_dma
(viodev));
return 0;
}
}
return -EINVAL;
}
static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
{
struct ibmveth_adapter *adapter = netdev_priv(dev);
struct vio_dev *viodev = adapter->vdev;
int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
int i, rc;
int need_restart = 0;
if (new_mtu < IBMVETH_MIN_MTU)
return -EINVAL;
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
break;
if (i == IBMVETH_NUM_BUFF_POOLS)
return -EINVAL;
/* Deactivate all the buffer pools so that the next loop can activate
only the buffer pools necessary to hold the new MTU */
if (netif_running(adapter->netdev)) {
need_restart = 1;
adapter->pool_config = 1;
ibmveth_close(adapter->netdev);
adapter->pool_config = 0;
}
/* Look for an active buffer pool that can hold the new MTU */
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
adapter->rx_buff_pool[i].active = 1;
if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
dev->mtu = new_mtu;
vio_cmo_set_dev_desired(viodev,
ibmveth_get_desired_dma
(viodev));
if (need_restart) {
return ibmveth_open(adapter->netdev);
}
return 0;
}
}
if (need_restart && (rc = ibmveth_open(adapter->netdev)))
return rc;
return -EINVAL;
}
