Linux Virtualization - Aug 2010 - [PATCH 1/1] staging: hv: Fix missing functions for net_device_ops (with detailed comments)

From: Haiyang Zhang <haiyangz at microsoft.com>

Fix missing functions for net_device_ops.
It's a bug when porting Linux IC from 2.6.27 to 2.6.32. In 2.6.27,
the default functions for Ethernet, like eth_change_mtu(), were assigned
by ether_setup(). But in 2.6.32, these function pointers moved to
net_device_ops structure and no longer be assigned in ether_setup(). So we
need to set these functions in our driver code. It will ensure the MTU won't
be set beyond 1500. Otherwise, this can cause an error on the server side,
because the HyperV linux driver doesn't support jumbo frame yet.

Requesting it to be backported to kernel 2.6.32 and later, which are all
versions containing Hyper-V drivers.

Signed-off-by: Haiyang Zhang <haiyangz at microsoft.com>
Signed-off-by: Hank Janssen <hjanssen at microsoft.com>

---
 drivers/staging/hv/netvsc_drv.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/staging/hv/netvsc_drv.c b/drivers/staging/hv/netvsc_drv.c
index 56e1157..64a0114 100644
--- a/drivers/staging/hv/netvsc_drv.c
+++ b/drivers/staging/hv/netvsc_drv.c
@@ -327,6 +327,9 @@ static const struct net_device_ops device_ops = {
 	.ndo_stop =			netvsc_close,
 	.ndo_start_xmit =		netvsc_start_xmit,
 	.ndo_set_multicast_list =	netvsc_set_multicast_list,
+	.ndo_change_mtu =		eth_change_mtu,
+	.ndo_validate_addr =		eth_validate_addr,
+	.ndo_set_mac_address =		eth_mac_addr,
 };
 
 static int netvsc_probe(struct device *device)
-- 
1.6.3.2