[RFC PATCH v2 net-next 09/15] net: ethtool: introduce ethtool_link_mode_str()

[Vladimir Oltean]

Allow driver code to print stuff like the resolved link mode to the
kernel log, by giving it access to the link_mode_names[] ethtool
internal array which already holds this info.

Signed-off-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>
---
v1->v2: patch is new

 include/linux/ethtool.h | 6 ++++++
 net/ethtool/common.c    | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 62b61527bcc4..7b144f2b7dfd 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -988,6 +988,12 @@ void
 ethtool_params_from_link_mode(struct ethtool_link_ksettings *link_ksettings,
 			      enum ethtool_link_mode_bit_indices link_mode);
 
+/**
+ * ethtool_link_mode_str - Get name of a given link mode, in string format
+ * @link_mode: the link mode represented in integer format
+ */
+const char *ethtool_link_mode_str(enum ethtool_link_mode_bit_indices link_mode);
+
 /**
  * ethtool_get_phc_vclocks - Derive phc vclocks information, and caller
  *                           is responsible to free memory of vclock_index
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index 2b3ddea465af..9a79548adb68 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -691,3 +691,9 @@ ethtool_params_from_link_mode(struct ethtool_link_ksettings *link_ksettings,
 	link_ksettings->base.duplex = link_info->duplex;
 }
 EXPORT_SYMBOL_GPL(ethtool_params_from_link_mode);
+
+const char *ethtool_link_mode_str(enum ethtool_link_mode_bit_indices link_mode)
+{
+	return link_mode_names[link_mode];
+}
+EXPORT_SYMBOL(ethtool_link_mode_str);
-- 
2.34.1