This is a note to let you know that I've just added the patch titled
net/eth/ibmveth: Fixup retrieval of MAC address
to the 3.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-eth-ibmveth-fixup-retrieval-of-mac-address.patch
and it can be found in the queue-3.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 13f85203e1060da83d9ec1c1c5a63343eaab8de4 Mon Sep 17 00:00:00 2001
From: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Date: Fri, 3 May 2013 17:19:01 +0000
Subject: net/eth/ibmveth: Fixup retrieval of MAC address
From: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
commit 13f85203e1060da83d9ec1c1c5a63343eaab8de4 upstream.
Some ancient pHyp versions used to create a 8 bytes local-mac-address
property in the device-tree instead of a 6 bytes one for veth.
The Linux driver code to deal with that is an insane hack which also
happens to break with some choices of MAC addresses in qemu by testing
for a bit in the address rather than just looking at the size of the
property.
Sanitize this by doing the latter instead.
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/ibm/ibmveth.c | 23 ++++++++++-------------
1 file changed, 10 insertions(+), 13 deletions(-)
--- a/drivers/net/ethernet/ibm/ibmveth.c
+++ b/drivers/net/ethernet/ibm/ibmveth.c
@@ -1324,7 +1324,7 @@ static const struct net_device_ops ibmve
static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
{
- int rc, i;
+ int rc, i, mac_len;
struct net_device *netdev;
struct ibmveth_adapter *adapter;
unsigned char *mac_addr_p;
@@ -1334,11 +1334,19 @@ static int ibmveth_probe(struct vio_dev
dev->unit_address);
mac_addr_p = (unsigned char *)vio_get_attribute(dev, VETH_MAC_ADDR,
- NULL);
+ &mac_len);
if (!mac_addr_p) {
dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n");
return -EINVAL;
}
+ /* Workaround for old/broken pHyp */
+ if (mac_len == 8)
+ mac_addr_p += 2;
+ else if (mac_len != 6) {
+ dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n",
+ mac_len);
+ return -EINVAL;
+ }
mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev,
VETH_MCAST_FILTER_SIZE, NULL);
@@ -1363,17 +1371,6 @@ static int ibmveth_probe(struct vio_dev
netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
- /*
- * Some older boxes running PHYP non-natively have an OF that returns
- * a 8-byte local-mac-address field (and the first 2 bytes have to be
- * ignored) while newer boxes' OF return a 6-byte field. Note that
- * IEEE 1275 specifies that local-mac-address must be a 6-byte field.
- * The RPA doc specifies that the first byte must be 10b, so we'll
- * just look for it to solve this 8 vs. 6 byte field issue
- */
- if ((*mac_addr_p & 0x3) != 0x02)
- mac_addr_p += 2;
-
adapter->mac_addr = 0;
memcpy(&adapter->mac_addr, mac_addr_p, 6);
Patches currently in stable-queue which might be from benh@xxxxxxxxxxxxxxxxxxx are
queue-3.9/powerpc-tm-fix-null-pointer-deference-in-flush_hash_page.patch
queue-3.9/powerpc-emulate-non-privileged-dscr-read-and-write.patch
queue-3.9/net-eth-ibmveth-fixup-retrieval-of-mac-address.patch
--
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