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| author | Thomas Falcon <tlfalcon@linux.ibm.com> | 2019-08-13 00:13:06 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-10 12:31:00 +0300 |
| commit | 37fd1f6629c27237a573f9012bab2462bb952423 (patch) | |
| tree | 292cc9b7ada1f28d42ee769ba1d7bf3425695e69 | |
| parent | 59d763634c2591add52ffbc9d851f1de1e8bbf3c (diff) | |
| download | linux-37fd1f6629c27237a573f9012bab2462bb952423.tar.xz | |
ibmveth: Convert multicast list size for little-endian system
[ Upstream commit 66cf4710b23ab2adda11155684a2c8826f4fe732 ]
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 <liuhangbin@gmail.com>
Signed-off-by: Thomas Falcon <tlfalcon@linux.ibm.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/ethernet/ibm/ibmveth.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/net/ethernet/ibm/ibmveth.c b/drivers/net/ethernet/ibm/ibmveth.c index 955f658f3b65..de9897c8e933 100644 --- a/drivers/net/ethernet/ibm/ibmveth.c +++ b/drivers/net/ethernet/ibm/ibmveth.c @@ -1557,7 +1557,7 @@ 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; @@ -1579,8 +1579,9 @@ 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"); @@ -1597,7 +1598,7 @@ 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; netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |