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ibmvnic: Remove unused bouce buffer 

The bounce buffer is not used in the ibmvnic driver, just
get rid of it.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Nathan Fontenot 2017-04-19 13:45:22 -04:00 committed by David S. Miller
parent 7f7adc5060
commit d76e0fec7e
2 changed files with 0 additions and 57 deletions
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53
drivers/net/ethernet/ibm/ibmvnic.c
View File

@ -502,50 +502,6 @@ static int init_tx_pools(struct net_device *netdev)
return 0;
}
static void release_bounce_buffer(struct ibmvnic_adapter *adapter)
{
struct device *dev = &adapter->vdev->dev;
if (!adapter->bounce_buffer)
return;
if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
dma_unmap_single(dev, adapter->bounce_buffer_dma,
adapter->bounce_buffer_size,
DMA_BIDIRECTIONAL);
adapter->bounce_buffer_dma = DMA_ERROR_CODE;
}
kfree(adapter->bounce_buffer);
adapter->bounce_buffer = NULL;
}
static int init_bounce_buffer(struct net_device *netdev)
{
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
struct device *dev = &adapter->vdev->dev;
char *buf;
int buf_sz;
dma_addr_t map_addr;
buf_sz = (netdev->mtu + ETH_HLEN - 1) / PAGE_SIZE + 1;
buf = kmalloc(adapter->bounce_buffer_size, GFP_KERNEL);
if (!buf)
return -1;
map_addr = dma_map_single(dev, buf, buf_sz, DMA_TO_DEVICE);
if (dma_mapping_error(dev, map_addr)) {
dev_err(dev, "Couldn't map bounce buffer\n");
kfree(buf);
return -1;
}
adapter->bounce_buffer = buf;
adapter->bounce_buffer_size = buf_sz;
adapter->bounce_buffer_dma = map_addr;
return 0;
}
static void release_error_buffers(struct ibmvnic_adapter *adapter)
{
struct device *dev = &adapter->vdev->dev;
@ -597,7 +553,6 @@ static int ibmvnic_login(struct net_device *netdev)
static void release_resources(struct ibmvnic_adapter *adapter)
{
release_bounce_buffer(adapter);
release_tx_pools(adapter);
release_rx_pools(adapter);
@ -656,10 +611,6 @@ static int ibmvnic_open(struct net_device *netdev)
if (rc)
goto ibmvnic_open_fail;
rc = init_bounce_buffer(netdev);
if (rc)
goto ibmvnic_open_fail;
replenish_pools(adapter);
/* We're ready to receive frames, enable the sub-crq interrupts and
@ -880,7 +831,6 @@ static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
unsigned int tx_bytes = 0;
dma_addr_t data_dma_addr;
struct netdev_queue *txq;
bool used_bounce = false;
unsigned long lpar_rc;
union sub_crq tx_crq;
unsigned int offset;
@ -921,7 +871,6 @@ static int ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
tx_buff->index = index;
tx_buff->pool_index = queue_num;
tx_buff->last_frag = true;
tx_buff->used_bounce = used_bounce;
memset(&tx_crq, 0, sizeof(tx_crq));
tx_crq.v1.first = IBMVNIC_CRQ_CMD;
@ -1517,7 +1466,6 @@ static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
continue;
txbuff->data_dma[j] = 0;
txbuff->used_bounce = false;
}
/* if sub_crq was sent indirectly */
first = txbuff->indir_arr[0].generic.first;
@ -3343,7 +3291,6 @@ static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
adapter = netdev_priv(netdev);
ret += PAGE_SIZE; /* the crq message queue */
ret += adapter->bounce_buffer_size;
ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)

4
drivers/net/ethernet/ibm/ibmvnic.h
View File

@ -868,7 +868,6 @@ struct ibmvnic_tx_buff {
int index;
int pool_index;
bool last_frag;
bool used_bounce;
union sub_crq indir_arr[6];
u8 hdr_data[140];
dma_addr_t indir_dma;
@ -924,9 +923,6 @@ struct ibmvnic_adapter {
dma_addr_t ip_offload_ctrl_tok;
bool migrated;
u32 msg_enable;
void *bounce_buffer;
int bounce_buffer_size;
dma_addr_t bounce_buffer_dma;
/* Statistics */
struct ibmvnic_statistics stats;