[NET]: ethtool ops are the only way

During the transition to the ethtool_ops way of doing things, we supported
calling the device's ->do_ioctl method to allow unconverted drivers to
continue working.  Those days are long behind us, all in-tree drivers
use the ethtool_ops way, and so we no longer need to support this.

The bonding driver is the biggest beneficiary of this; it no longer
needs to call ioctl() as a fallback if ethtool_ops aren't supported.

Also put a proper copyright statement on ethtool.c.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 26 deletions

diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 7b4ce91..b40dada 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -29,35 +29,24 @@
  * Determine initial path cost based on speed.
  * using recommendations from 802.1d standard
  *
- * Need to simulate user ioctl because not all device's that support
- * ethtool, use ethtool_ops.  Also, since driver might sleep need to
- * not be holding any locks.
+ * Since driver might sleep need to not be holding any locks.
  */
 static int port_cost(struct net_device *dev)
 {
-	struct ethtool_cmd ecmd = { ETHTOOL_GSET };
-	struct ifreq ifr;
-	mm_segment_t old_fs;
-	int err;
-
-	strncpy(ifr.ifr_name, dev->name, IFNAMSIZ);
-	ifr.ifr_data = (void __user *) &ecmd;
-
-	old_fs = get_fs();
-	set_fs(KERNEL_DS);
-	err = dev_ethtool(&ifr);
-	set_fs(old_fs);
-
-	if (!err) {
-		switch(ecmd.speed) {
-		case SPEED_100:
-			return 19;
-		case SPEED_1000:
-			return 4;
-		case SPEED_10000:
-			return 2;
-		case SPEED_10:
-			return 100;
+	if (dev->ethtool_ops->get_settings) {
+		struct ethtool_cmd ecmd = { ETHTOOL_GSET };
+		int err = dev->ethtool_ops->get_settings(dev, &ecmd);
+		if (!err) {
+			switch(ecmd.speed) {
+			case SPEED_100:
+				return 19;
+			case SPEED_1000:
+				return 4;
+			case SPEED_10000:
+				return 2;
+			case SPEED_10:
+				return 100;
+			}
 		}
 	}