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/net/core/dev.c b/net/core/dev.c
index 7db99b5..e95dc30 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4496,6 +4496,30 @@
}
/**
+ * dev_ethtool_get_settings - call device's ethtool_ops::get_settings()
+ * @dev: device
+ * @cmd: memory area for ethtool_ops::get_settings() result
+ *
+ * The cmd arg is initialized properly (cleared and
+ * ethtool_cmd::cmd field set to ETHTOOL_GSET).
+ *
+ * Return device's ethtool_ops::get_settings() result value or
+ * -EOPNOTSUPP when device doesn't expose
+ * ethtool_ops::get_settings() operation.
+ */
+int dev_ethtool_get_settings(struct net_device *dev,
+ struct ethtool_cmd *cmd)
+{
+ if (!dev->ethtool_ops || !dev->ethtool_ops->get_settings)
+ return -EOPNOTSUPP;
+
+ memset(cmd, 0, sizeof(struct ethtool_cmd));
+ cmd->cmd = ETHTOOL_GSET;
+ return dev->ethtool_ops->get_settings(dev, cmd);
+}
+EXPORT_SYMBOL(dev_ethtool_get_settings);
+
+/**
* dev_get_flags - get flags reported to userspace
* @dev: device
*