--- zzzz-none-000/linux-4.9.276/include/uapi/linux/ethtool.h	2021-07-20 14:21:16.000000000 +0000
+++ falcon-5530-750/linux-4.9.276/include/uapi/linux/ethtool.h	2023-04-05 08:19:02.000000000 +0000
@@ -1488,7 +1488,7 @@
 
 static inline int ethtool_validate_speed(__u32 speed)
 {
-	return speed <= INT_MAX || speed == SPEED_UNKNOWN;
+	return speed <= INT_MAX || speed == (__u32)SPEED_UNKNOWN;
 }
 
 /* Duplex, half or full. */