[ETHTOOL] Provide default behaviors for a few ethtool sub-ioctls

For the operations
	get-tx-csum
	get-sg
	get-tso
	get-ufo
the default ethtool_op_xxx behavior is fine for all drivers, so we
permit op==NULL to imply the default behavior.

This provides a more uniform behavior across all drivers, eliminating
ethtool(8) "ioctl not supported" errors on older drivers that had
not been updated for the latest sub-ioctls.

The ethtool_op_xxx() functions are left exported, in case anyone
wishes to call them directly from a driver-private implementation --
a not-uncommon case.  Should an ethtool_op_xxx() helper remain unused
for a while, except by net/core/ethtool.c, we can un-export it at a
later date.

[ Resolved conflicts with set/get value ethtool patch... -DaveM ]

Signed-off-by: Jeff Garzik <jeff@garzik.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 0 insertions, 3 deletions

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 78e344ae7051..f464b82c7d5f 100644
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -1617,11 +1617,8 @@ static void backend_changed(struct xenbus_device *dev,
 
 static struct ethtool_ops xennet_ethtool_ops =
 {
-        .get_tx_csum = ethtool_op_get_tx_csum,
         .set_tx_csum = ethtool_op_set_tx_csum,
-        .get_sg = ethtool_op_get_sg,
         .set_sg = xennet_set_sg,
-        .get_tso = ethtool_op_get_tso,
         .set_tso = xennet_set_tso,
         .get_link = ethtool_op_get_link,
 };