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 b5fc9f39122b..ae8c68f30f1b 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;