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ibmvnic: Create init/release routines for stats token 

Create an initialization and a release routine for the stats token used by
the ibmvnic driver.

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 2017-03-30 02:49:23 -04:00 committed by David S. Miller
parent b510888f96
commit 7bbc27a496
1 changed files with 34 additions and 12 deletions
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46
drivers/net/ethernet/ibm/ibmvnic.c
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@ -302,6 +302,36 @@ static void replenish_pools(struct ibmvnic_adapter *adapter)
}
}
static void release_stats_token(struct ibmvnic_adapter *adapter)
{
struct device *dev = &adapter->vdev->dev;
if (!adapter->stats_token)
return;
dma_unmap_single(dev, adapter->stats_token,
sizeof(struct ibmvnic_statistics),
DMA_FROM_DEVICE);
adapter->stats_token = 0;
}
static int init_stats_token(struct ibmvnic_adapter *adapter)
{
struct device *dev = &adapter->vdev->dev;
dma_addr_t stok;
stok = dma_map_single(dev, &adapter->stats,
sizeof(struct ibmvnic_statistics),
DMA_FROM_DEVICE);
if (dma_mapping_error(dev, stok)) {
dev_err(dev, "Couldn't map stats buffer\n");
return -1;
}
adapter->stats_token = stok;
return 0;
}
static void release_rx_pools(struct ibmvnic_adapter *adapter)
{
struct ibmvnic_rx_pool *rx_pool;
@ -647,8 +677,6 @@ static int ibmvnic_open(struct net_device *netdev)
static void ibmvnic_release_resources(struct ibmvnic_adapter *adapter)
{
struct device *dev = &adapter->vdev->dev;
release_bounce_buffer(adapter);
release_tx_pools(adapter);
release_rx_pools(adapter);
@ -656,10 +684,7 @@ static void ibmvnic_release_resources(struct ibmvnic_adapter *adapter)
release_sub_crqs(adapter);
release_crq_queue(adapter);
if (adapter->stats_token)
dma_unmap_single(dev, adapter->stats_token,
sizeof(struct ibmvnic_statistics),
DMA_FROM_DEVICE);
release_stats_token(adapter);
}
static int ibmvnic_close(struct net_device *netdev)
@ -3269,13 +3294,10 @@ static int ibmvnic_init(struct ibmvnic_adapter *adapter)
return rc;
}
adapter->stats_token = dma_map_single(dev, &adapter->stats,
sizeof(struct ibmvnic_statistics),
DMA_FROM_DEVICE);
if (dma_mapping_error(dev, adapter->stats_token)) {
rc = init_stats_token(adapter);
if (rc) {
release_crq_queue(adapter);
dev_err(dev, "Couldn't map stats buffer\n");
return -ENOMEM;
return rc;
}
init_completion(&adapter->init_done);