--- zzzz-none-000/linux-4.9.218/include/uapi/linux/ethtool.h	2020-04-02 15:20:41.000000000 +0000
+++ seale-7590ax-750/linux-4.9.218/include/uapi/linux/ethtool.h	2023-03-29 10:59:08.000000000 +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. */