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>
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 7e6e0a8..4194a20 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -744,7 +744,9 @@
/**
* struct ethtool_ops - optional netdev operations
* @get_settings: Get various device settings including Ethernet link
- * settings. Returns a negative error code or zero.
+ * settings. The @cmd parameter is expected to have been cleared
+ * before get_settings is called. Returns a negative error code or
+ * zero.
* @set_settings: Set various device settings including Ethernet link
* settings. Returns a negative error code or zero.
* @get_drvinfo: Report driver/device information. Should only set the
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index e03af35..d5de66a 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2597,13 +2597,8 @@
extern struct pernet_operations __net_initdata loopback_net_ops;
-static inline int dev_ethtool_get_settings(struct net_device *dev,
- struct ethtool_cmd *cmd)
-{
- if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
- return -EOPNOTSUPP;
- return dev->ethtool_ops->get_settings(dev, cmd);
-}
+int dev_ethtool_get_settings(struct net_device *dev,
+ struct ethtool_cmd *cmd);
static inline u32 dev_ethtool_get_rx_csum(struct net_device *dev)
{