From: David Bauer mail@david-bauer.net
[ Upstream commit 32085f25d7b68404055f3525c780142fc72e543f ]
Geert Uytterhoeven reported that using devm_reset_controller_get leads to a WARNING when probing a reset-controlled PHY. This is because the device devm_reset_controller_get gets supplied is not actually the one being probed.
Acquire an unmanaged reset-control as well as free the reset_control on unregister to fix this.
Reported-by: Geert Uytterhoeven geert@linux-m68k.org CC: Andrew Lunn andrew@lunn.ch Signed-off-by: David Bauer mail@david-bauer.net Reviewed-by: Andrew Lunn andrew@lunn.ch Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/phy/mdio_bus.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -62,8 +62,8 @@ static int mdiobus_register_reset(struct struct reset_control *reset = NULL;
if (mdiodev->dev.of_node) - reset = devm_reset_control_get_exclusive(&mdiodev->dev, - "phy"); + reset = of_reset_control_get_exclusive(mdiodev->dev.of_node, + "phy"); if (IS_ERR(reset)) { if (PTR_ERR(reset) == -ENOENT || PTR_ERR(reset) == -ENOTSUPP) reset = NULL; @@ -107,6 +107,8 @@ int mdiobus_unregister_device(struct mdi if (mdiodev->bus->mdio_map[mdiodev->addr] != mdiodev) return -EINVAL;
+ reset_control_put(mdiodev->reset_ctrl); + mdiodev->bus->mdio_map[mdiodev->addr] = NULL;
return 0;