openwrt/target/linux/generic/pending-5.15/684-of_net-do-mac-address-increment-only-once.patch

From dd07dd394d8bfdb5d527fab18ca54f20815ec4e4 Mon Sep 17 00:00:00 2001
From: Will Moss <willormos@gmail.com>
Date: Wed, 3 Aug 2022 13:48:55 +0000
Subject: [PATCH] of_net: do mac-address-increment only once

Remove mac-address-increment and mac-address-increment-byte
DT property after incrementing process to make sure MAC address
would not get incremented more if this function is stared again.
It could happen if device initialization is deferred after
unsuccessful attempt.

Signed-off-by: Will Moss <willormos@gmail.com>
---
 drivers/of/of_net.c | 6 ++++++
 1 file changed, 6 insertions(+)

--- a/net/core/of_net.c
+++ b/net/core/of_net.c
@@ -194,6 +194,12 @@ found:
 		addr[3] = (mac_val >> 16) & 0xff;
 		addr[4] = (mac_val >> 8) & 0xff;
 		addr[5] = (mac_val >> 0) & 0xff;
+
+		/* Remove mac-address-increment and mac-address-increment-byte
+		 * DT property to make sure MAC address would not get incremented
+		 * more if this function is stared again. */
+		of_remove_property(np, of_find_property(np, "mac-address-increment", NULL));
+		of_remove_property(np, of_find_property(np, "mac-address-increment-byte", NULL));
 	}
 
 	of_add_mac_address(np, addr);