The ibm,mac-address-filters property defines the maximum number of
addresses the hypervisor's multicast filter list can support. It is
encoded as a big-endian integer in the OF device tree, but the virtual
ethernet driver does not convert it for use by little-endian systems.
As a result, the driver is not behaving as it should on affected systems
when a large number of multicast addresses are assigned to the device.
Reported-by: Hangbin Liu <liuhang...@gmail.com>
Signed-off-by: Thomas Falcon <tlfal...@linux.ibm.com>
---
v2: define filter size pointer as __be32 instead of unsigned int,
suggested by Joe Perches
---
drivers/net/ethernet/ibm/ibmveth.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/ibm/ibmveth.c
b/drivers/net/ethernet/ibm/ibmveth.c
index 77af9c2c0571..5641c00d34f2 100644
--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -1643,7 +1643,7 @@ static int ibmveth_probe(struct vio_dev *dev, const
struct vio_device_id *id)
struct net_device *netdev;
struct ibmveth_adapter *adapter;
unsigned char *mac_addr_p;
- unsigned int *mcastFilterSize_p;
+ __be32 *mcastFilterSize_p;
long ret;
unsigned long ret_attr;
@@ -1665,8 +1665,9 @@ static int ibmveth_probe(struct vio_dev *dev, const
struct vio_device_id *id)
return -EINVAL;
}
- mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev,
- VETH_MCAST_FILTER_SIZE, NULL);
+ mcastFilterSize_p = (__be32 *)vio_get_attribute(dev,
+ VETH_MCAST_FILTER_SIZE,
+ NULL);
if (!mcastFilterSize_p) {
dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE "
"attribute\n");
@@ -1683,7 +1684,7 @@ static int ibmveth_probe(struct vio_dev *dev, const
struct vio_device_id *id)
adapter->vdev = dev;
adapter->netdev = netdev;
- adapter->mcastFilterSize = *mcastFilterSize_p;
+ adapter->mcastFilterSize = be32_to_cpu(*mcastFilterSize_p);
adapter->pool_config = 0;
ibmveth_init_link_settings(adapter);
--
2.16.4
