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[ Upstream commite2d79cd887] When devm_gpiod_get_optional() fails, bus should be freed just like when of_mdiobus_register() fails. Fixes:1bddd96cba("net: arc_emac: support the phy reset for emac driver") Signed-off-by: Dinghao Liu <dinghao.liu@zju.edu.cn> Reviewed-by: Andrew Lunn <andrew@lunn.ch> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>