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-rw-r--r--include/linux/ethtool.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/ethtool.h b/include/linux/ethtool.h
index 45f00b61c09..de33de1e205 100644
--- a/include/linux/ethtool.h
+++ b/include/linux/ethtool.h
@@ -1097,10 +1097,12 @@ struct ethtool_ops {
#define SPEED_1000 1000
#define SPEED_2500 2500
#define SPEED_10000 10000
+#define SPEED_UNKNOWN -1
/* Duplex, half or full. */
#define DUPLEX_HALF 0x00
#define DUPLEX_FULL 0x01
+#define DUPLEX_UNKNOWN 0xff
/* Which connector port. */
#define PORT_TP 0x00