[PATCH net-next v2] net: airoha: simplify WAN device check in airoha_dev_init()

[Lorenzo Bianconi <lorenzo@kernel.org>]

airoha_register_gdm_devices() iterates eth->ports[] in order, so GDM2's
netdev is always registered before GDM3/GDM4. This means the explicit
check for eth->ports[1] && eth->ports[1]->devs[0] is a redundant
special-case of what airoha_get_wan_gdm_dev() already covers, since
GDM2 is always marked as WAN during its own ndo_init.
Remove the redundant check and rely solely on airoha_get_wan_gdm_dev()
which handles both the GDM2-present and GDM2-absent cases.

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
Changes in v2:
- Rebase on top of net-next.
- Link to v1: https://lore.kernel.org/r/20260606-airoha-eth-simplify-dev-init-v1-1-f08f8e404049@kernel.org
---
 drivers/net/ethernet/airoha/airoha_eth.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c
index 5a8e84fa9918..b333a7b309c2 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.c
+++ b/drivers/net/ethernet/airoha/airoha_eth.c
@@ -2004,18 +2004,10 @@ static int airoha_dev_init(struct net_device *netdev)
 
 	switch (port->id) {
 	case AIROHA_GDM3_IDX:
-	case AIROHA_GDM4_IDX: {
-		struct airoha_eth *eth = dev->eth;
-
-		/* GDM2 supports a single net_device */
-		if (eth->ports[1] && eth->ports[1]->devs[0])
-			break;
-
-		if (airoha_get_wan_gdm_dev(eth))
+	case AIROHA_GDM4_IDX:
+		if (airoha_get_wan_gdm_dev(dev->eth))
 			break;
-
 		fallthrough;
-	}
 	case AIROHA_GDM2_IDX:
 		/* GDM2 is always used as wan */
 		dev->flags |= AIROHA_PRIV_F_WAN;

---
base-commit: 5855479abc796c3b5d7b2f2ca147d68fc56cae1f
change-id: 20260606-airoha-eth-simplify-dev-init-5d53c7cc004e

Best regards,
-- 
Lorenzo Bianconi <lorenzo@kernel.org>