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>

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index 221d652..e8c72ab 100644 (file)
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -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 @@ restart_loop:
                                        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++)

diff --git a/drivers/net/ethernet/ibm/ibmvnic.h b/drivers/net/ethernet/ibm/ibmvnic.h
index 8fbe05d..355225c 100644 (file)
--- a/drivers/net/ethernet/ibm/ibmvnic.h
+++ b/drivers/net/ethernet/ibm/ibmvnic.h
@@ -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;