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ax88179_178a: fix bonding failure

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[ Upstream commit 95ff886887 ]

The following patch fixes a bug which causes the ax88179_178a driver to be
incapable of being added to a bond.

When I brought up the issue with the bonding maintainers, they indicated
that the real problem was with the NIC driver which must return zero for
success (of setting the MAC address). I see that several other NIC drivers
follow that pattern by either simply always returing zero, or by passing
through a negative (error) result while rewriting any positive return code
to zero. With that same philisophy applied to the ax88179_178a driver, it
allows it to work correctly with the bonding driver.

I believe this is suitable for queuing in -stable, as it's a small, simple,
and obvious fix that corrects a defect with no other known workaround.

This patch is against vanilla 3.17(.0).

Signed-off-by: Ian Morgan <imorgan@primordial.ca>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Morgan
2014-10-19 08:05:13 -04:00
committed by Greg Kroah-Hartman
parent 4449361e6f
commit 9744aac693
1 changed files with 6 additions and 1 deletions
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7
drivers/net/usb/ax88179_178a.c
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@@ -695,6 +695,7 @@ static int ax88179_set_mac_addr(struct net_device *net, void *p)
{
struct usbnet *dev = netdev_priv(net);
struct sockaddr *addr = p;
int ret;
if (netif_running(net))
return -EBUSY;
@@ -704,8 +705,12 @@ static int ax88179_set_mac_addr(struct net_device *net, void *p)
memcpy(net->dev_addr, addr->sa_data, ETH_ALEN);
/* Set the MAC address */
return ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_NODE_ID, ETH_ALEN,
ret = ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_NODE_ID, ETH_ALEN,
ETH_ALEN, net->dev_addr);
if (ret < 0)
return ret;
return 0;
}
static const struct net_device_ops ax88179_netdev_ops = {