[PATCH AUTOSEL 4.9 04/16] ibmveth: Convert multicast list size for little-endian system
From: Sasha Levin <sashal@kernel.org>
Date: 2019-08-29 18:17:55
Also in:
linuxppc-dev, lkml, stable
Subsystem:
ibm power virtual ethernet device driver, linux for powerpc (32-bit and 64-bit), networking drivers, the rest · Maintainers:
Nick Child, Madhavan Srinivasan, Michael Ellerman, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
From: Thomas Falcon <redacted> [ 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 <redacted> Signed-off-by: Thomas Falcon <redacted> Signed-off-by: Jakub Kicinski <redacted> Signed-off-by: Sasha Levin <sashal@kernel.org> --- 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 955f658f3b65f..de9897c8e9331 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);
--
2.20.1