generic: 6.6: net: ethernet: mediatek: Allow gaps in MAC allocation

Some devices with MediaTek SoCs don't use the first but only the second
MAC in the chip. Especially with MT7981 which got a built-in 1GE PHY
connected to the second MAC this is quite common.
Make sure to reset and enable PSE also in those cases by skipping gaps
using 'continue' instead of aborting the loop using 'break'.

Fixes: 75081235b8 ("generic: 6.6: (re-)add support multiple PPE to mtk_eth_soc")
Reported-by: Daniel Suchy <[email protected]>
Signed-off-by: Daniel Golle <[email protected]>

target/linux/generic/pending-6.6/734-net-ethernet-mediatek-Allow-gaps-in-MAC-allocation.patch

@@ -0,0 +1,33 @@
+From 379ae584cea112db60f4ada79c7e5ba4f3364a64 Mon Sep 17 00:00:00 2001
+X-Patchwork-Submitter: Daniel Golle <[email protected]>
+X-Patchwork-Id: 13718593
+X-Patchwork-Delegate: [email protected]
+List-Id: <netdev.vger.kernel.org>
+From: Daniel Golle <[email protected]>
+Date: Mon, 1 Jul 2024 19:26:28 +0100
+Subject: [PATCH] net: ethernet: mediatek: Allow gaps in MAC allocation
+
+Some devices with MediaTek SoCs don't use the first but only the second
+MAC in the chip. Especially with MT7981 which got a built-in 1GE PHY
+connected to the second MAC this is quite common.
+Make sure to reset and enable PSE also in those cases by skipping gaps
+using 'continue' instead of aborting the loop using 'break'.
+
+Fixes: dee4dd10c79a ("net: ethernet: mtk_eth_soc: ppe: add support for multiple PPEs")
+Suggested-by: Elad Yifee <[email protected]>
+Signed-off-by: Daniel Golle <[email protected]>
+---
+ drivers/net/ethernet/mediatek/mtk_eth_soc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
++++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+@@ -3431,7 +3431,7 @@ static int mtk_open(struct net_device *d
+ 
+ 		for (i = 0; i < MTK_MAX_DEVS; i++) {
+ 			if (!eth->netdev[i])
+-				break;
++				continue;
+ 
+ 			target_mac = netdev_priv(eth->netdev[i]);
+ 			if (!soc->offload_version) {