diff options
| author | Marcin Wojtas <mw@semihalf.com> | 2021-06-25 12:38:53 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-25 11:46:29 -0700 |
| commit | ac53c26433b51f1835ce5a935970e427d83e3ec5 (patch) | |
| tree | cdbef2f33dc8a68365c9bbc569d49d330c743002 /drivers/net/ethernet/marvell/mvmdio.c | |
| parent | f92e1869d74e1acc6551256eb084a1c14a054e19 (diff) | |
net: mdiobus: withdraw fwnode_mdbiobus_register
The newly implemented fwnode_mdbiobus_register turned out to be
problematic - in case the fwnode_/of_/acpi_mdio are built as
modules, a dependency cycle can be observed during the depmod phase of
modules_install, eg.:
depmod: ERROR: Cycle detected: fwnode_mdio -> of_mdio -> fwnode_mdio
depmod: ERROR: Found 2 modules in dependency cycles!
OR:
depmod: ERROR: Cycle detected: acpi_mdio -> fwnode_mdio -> acpi_mdio
depmod: ERROR: Found 2 modules in dependency cycles!
A possible solution could be to rework fwnode_mdiobus_register,
so that to merge the contents of acpi_mdiobus_register and
of_mdiobus_register. However feasible, such change would
be very intrusive and affect huge amount of the of_mdiobus_register
users.
Since there are currently 2 users of ACPI and MDIO
(xgmac_mdio and mvmdio), withdraw the fwnode_mdbiobus_register
and roll back to a simple 'if' condition in affected drivers.
Fixes: 62a6ef6a996f ("net: mdiobus: Introduce fwnode_mdbiobus_register()")
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/marvell/mvmdio.c')
| -rw-r--r-- | drivers/net/ethernet/marvell/mvmdio.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/net/ethernet/marvell/mvmdio.c b/drivers/net/ethernet/marvell/mvmdio.c index 7537ee3f6622..62a97c46fba0 100644 --- a/drivers/net/ethernet/marvell/mvmdio.c +++ b/drivers/net/ethernet/marvell/mvmdio.c @@ -18,9 +18,9 @@ */ #include <linux/acpi.h> +#include <linux/acpi_mdio.h> #include <linux/clk.h> #include <linux/delay.h> -#include <linux/fwnode_mdio.h> #include <linux/interrupt.h> #include <linux/io.h> #include <linux/kernel.h> @@ -371,7 +371,13 @@ static int orion_mdio_probe(struct platform_device *pdev) goto out_mdio; } - ret = fwnode_mdiobus_register(bus, pdev->dev.fwnode); + /* For the platforms not supporting DT/ACPI fall-back + * to mdiobus_register via of_mdiobus_register. + */ + if (is_acpi_node(pdev->dev.fwnode)) + ret = acpi_mdiobus_register(bus, pdev->dev.fwnode); + else + ret = of_mdiobus_register(bus, pdev->dev.of_node); if (ret < 0) { dev_err(&pdev->dev, "Cannot register MDIO bus (%d)\n", ret); goto out_mdio; |