net: stmmac: Handle disabled MDIO busses from devicetree

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[ Upstream commit e23c0d21ce ]

Many hardware configurations have the MDIO bus disabled, and are instead
using some other MDIO bus to talk to the MAC's phy.

of_mdiobus_register() returns -ENODEV in this case. Let's handle it
gracefully instead of failing to probe the MAC.

Fixes: 47dd7a540b ("net: add support for STMicroelectronics Ethernet controllers.")
Signed-off-by: Andrew Halaney <ahalaney@redhat.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Link: https://lore.kernel.org/r/20231212-b4-stmmac-handle-mdio-enodev-v2-1-600171acf79f@redhat.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Andrew Halaney 2023-12-12 16:18:33 -06:00 • committed by Greg Kroah-Hartman

parent 9aac81639e

commit d835299dde

1 changed files with 5 additions and 1 deletions

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drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c

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