netdev - [PATCH for net-next] if_ether.h: Clarify ethertype validity for gsw1xx dsa

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Message-ID: <20251114135935.2710873-1-peterend@axis.com>
Date: Fri, 14 Nov 2025 14:59:36 +0100
From: Peter Enderborg <peterend@...s.com>
To: Andrew Lunn <andrew+netdev@...n.ch>, "David S . Miller"
	<davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski
	<kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, <netdev@...r.kernel.org>,
	Daniel Golle <daniel@...rotopia.org>
CC: Peter Enderborg <peterend@...s.com>
Subject: [PATCH for net-next] if_ether.h: Clarify ethertype validity for gsw1xx dsa

This 0x88C3 is registered to Infineon Technologies Corporate Research ST
and are used by MaxLinear. Infineon subsidiary Lantiq was acquired
by Intel. MaxLinear bought IP's from Intel including this network chip.
Ref https://standards-oui.ieee.org/ethertype/eth.txt

Signed-off-by: Peter Enderborg <peterend@...s.com>
---
 include/uapi/linux/if_ether.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/if_ether.h b/include/uapi/linux/if_ether.h
index 2c93b7b731c8..df9d44a11540 100644
--- a/include/uapi/linux/if_ether.h
+++ b/include/uapi/linux/if_ether.h
@@ -92,7 +92,9 @@
 #define ETH_P_ETHERCAT	0x88A4		/* EtherCAT			*/
 #define ETH_P_8021AD	0x88A8          /* 802.1ad Service VLAN		*/
 #define ETH_P_802_EX1	0x88B5		/* 802.1 Local Experimental 1.  */
-#define ETH_P_MXLGSW	0x88C3		/* MaxLinear GSW DSA [ NOT AN OFFICIALLY REGISTERED ID ] */
+#define ETH_P_MXLGSW	0x88C3		/* Infineon Technologies Corporate Research ST
+					 * Used by MaxLinear GSW DSA
+					 */
 #define ETH_P_PREAUTH	0x88C7		/* 802.11 Preauthentication */
 #define ETH_P_TIPC	0x88CA		/* TIPC 			*/
 #define ETH_P_LLDP	0x88CC		/* Link Layer Discovery Protocol */
-- 
2.34.1