ethtool: Call ethtool's get/set_settings callbacks with cleaned data

This makes sure that when a driver calls the ethtool's
get/set_settings() callback of another driver, the data passed to it
is clean. This guarantees that speed_hi will be zeroed correctly if
the called callback doesn't explicitely set it: we are sure we don't
get a corrupted speed from the underlying driver. We also take care of
setting the cmd field appropriately (ETHTOOL_GSET/SSET).

This applies to dev_ethtool_get_settings(), which now makes sure it
sets up that ethtool command parameter correctly before passing it to
drivers. This also means that whoever calls dev_ethtool_get_settings()
does not have to clean the ethtool command parameter. This function
also becomes an exported symbol instead of an inline.

All drivers visible to make allyesconfig under x86_64 have been
updated.

Signed-off-by: David Decotigny <decot@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 6 deletions

diff --git a/include/rdma/ib_addr.h b/include/rdma/ib_addr.h
index b5fc9f3..ae8c68f 100644
--- a/include/rdma/ib_addr.h
+++ b/include/rdma/ib_addr.h
@@ -217,18 +217,19 @@ static inline enum ib_mtu iboe_get_mtu(int mtu)
 static inline int iboe_get_rate(struct net_device *dev)
 {
 	struct ethtool_cmd cmd;
+	u32 speed;
 
-	if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings ||
-	    dev->ethtool_ops->get_settings(dev, &cmd))
+	if (dev_ethtool_get_settings(dev, &cmd))
 		return IB_RATE_PORT_CURRENT;
 
-	if (cmd.speed >= 40000)
+	speed = ethtool_cmd_speed(&cmd);
+	if (speed >= 40000)
 		return IB_RATE_40_GBPS;
-	else if (cmd.speed >= 30000)
+	else if (speed >= 30000)
 		return IB_RATE_30_GBPS;
-	else if (cmd.speed >= 20000)
+	else if (speed >= 20000)
 		return IB_RATE_20_GBPS;
-	else if (cmd.speed >= 10000)
+	else if (speed >= 10000)
 		return IB_RATE_10_GBPS;
 	else
 		return IB_RATE_PORT_CURRENT;