net: airoha: Do not stop GDM port if it is shared

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Theoretically, in the current codebase, two independent net_devices can
be connected to the same GDM port so we need to check the GDM port is not
used by any other running net_device before setting the forward
configuration to FE_PSE_PORT_DROP.
Moreover, always set in GDM_LONG_LEN_MASK field of REG_GDM_LEN_CFG
register the maximum MTU of all running net_devices connected to the same
GDM port.

Tested-by: Xuegang Lu <xuegang.lu@airoha.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260603-airoha-eth-multi-serdes-v9-4-5d476bc2f426@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Lorenzo Bianconi 2026-06-03 08:00:18 +02:00 • committed by Jakub Kicinski

parent a9c2ca61fe

commit 99b9d095d7

2 changed files with 48 additions and 12 deletions

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59

drivers/net/ethernet/airoha/airoha_eth.c

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1

drivers/net/ethernet/airoha/airoha_eth.h

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