From: Anton Blanchard <anton@xxxxxxxxx>
This patch does NOT apply to the 3.12 stable tree. If you still want
it applied, please provide a backport.
===============
commit d746ca9561440685edb62614d1bcbbc27ff50e66 upstream.
The code to load a MAC address into a u64 for passing to the
hypervisor via a register is broken on little endian.
Create a helper function called ibmveth_encode_mac_addr
which does the right thing in both big and little endian.
We were storing the MAC address in a long in struct ibmveth_adapter.
It's never used so remove it - we don't need another place in the
driver where we create endian issues with MAC addresses.
Signed-off-by: Anton Blanchard <anton@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
---
drivers/net/ethernet/ibm/ibmveth.c | 25 ++++++++++++++++---------
drivers/net/ethernet/ibm/ibmveth.h | 1 -
2 files changed, 16 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c
index 4be971590461..1fc8334fc181 100644
--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -522,10 +522,21 @@ retry:
return rc;
}
+static u64 ibmveth_encode_mac_addr(u8 *mac)
+{
+ int i;
+ u64 encoded = 0;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ encoded = (encoded << 8) | mac[i];
+
+ return encoded;
+}
+
static int ibmveth_open(struct net_device *netdev)
{
struct ibmveth_adapter *adapter = netdev_priv(netdev);
- u64 mac_address = 0;
+ u64 mac_address;
int rxq_entries = 1;
unsigned long lpar_rc;
int rc;
@@ -579,8 +590,7 @@ static int ibmveth_open(struct net_device *netdev)
adapter->rx_queue.num_slots = rxq_entries;
adapter->rx_queue.toggle = 1;
- memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
- mac_address = mac_address >> 16;
+ mac_address = ibmveth_encode_mac_addr(netdev->dev_addr);
rxq_desc.fields.flags_len = IBMVETH_BUF_VALID |
adapter->rx_queue.queue_len;
@@ -1183,8 +1193,8 @@ static void ibmveth_set_multicast_list(struct net_device *netdev)
/* add the addresses to the filter table */
netdev_for_each_mc_addr(ha, netdev) {
/* add the multicast address to the filter table */
- unsigned long mcast_addr = 0;
- memcpy(((char *)&mcast_addr)+2, ha->addr, ETH_ALEN);
+ u64 mcast_addr;
+ mcast_addr = ibmveth_encode_mac_addr(ha->addr);
lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
IbmVethMcastAddFilter,
mcast_addr);
@@ -1372,9 +1382,6 @@ static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
- adapter->mac_addr = 0;
- memcpy(&adapter->mac_addr, mac_addr_p, ETH_ALEN);
-
netdev->irq = dev->irq;
netdev->netdev_ops = &ibmveth_netdev_ops;
netdev->ethtool_ops = &netdev_ethtool_ops;
@@ -1383,7 +1390,7 @@ static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
netdev->features |= netdev->hw_features;
- memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
+ memcpy(netdev->dev_addr, mac_addr_p, ETH_ALEN);
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
diff --git a/drivers/net/ethernet/ibm/ibmveth.h b/drivers/net/ethernet/ibm/ibmveth.h
index 451ba7949e15..1f37499d4398 100644
--- a/drivers/net/ethernet/ibm/ibmveth.h
+++ b/drivers/net/ethernet/ibm/ibmveth.h
@@ -138,7 +138,6 @@ struct ibmveth_adapter {
struct napi_struct napi;
struct net_device_stats stats;
unsigned int mcastFilterSize;
- unsigned long mac_addr;
void * buffer_list_addr;
void * filter_list_addr;
dma_addr_t buffer_list_dma;
--
1.9.0
--
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