net: mdiobus: release reset_gpio in mdiobus_unregister_device()

commit 8ea25274ebaf2f6be8be374633b2ed8348ec0e70 upstream.

reset_gpio is claimed in mdiobus_register_device(), but it is not
released in mdiobus_unregister_device(). It is instead only
released when the whole MDIO bus is unregistered.
When a device uses the reset_gpio property, it becomes impossible
to unregister it and register it again, because the GPIO remains
claimed.
This patch resolves that issue.

Fixes: bafbdd527d56 ("phylib: Add device reset GPIO support") # see notes
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Cc: Csókás Bence <csokas.bence@prolan.hu>
[ csokas.bence: Resolve rebase conflict and clarify msg ]
Signed-off-by: Buday Csaba <buday.csaba@prolan.hu>
Link: https://patch.msgid.link/20250807135449.254254-2-csokas.bence@prolan.hu
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
[ csokas.bence: Use the v1 patch on top of 6.12, as specified in notes ]
Signed-off-by: Bence Csókás <csokas.bence@prolan.hu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/phy/mdio_bus.c b/drivers/net/phy/mdio_bus.c
index 591e8fd33d8ea609b008eea2da1a5f8a2f5ffc22..a508cd81cd4ed9a9245dcf799579bbe0d470e3ea 100644 (file)
--- a/drivers/net/phy/mdio_bus.c
+++ b/drivers/net/phy/mdio_bus.c
@@ -97,6 +97,7 @@ int mdiobus_unregister_device(struct mdio_device *mdiodev)
        if (mdiodev->bus->mdio_map[mdiodev->addr] != mdiodev)
                return -EINVAL;
 
+       gpiod_put(mdiodev->reset_gpio);
        reset_control_put(mdiodev->reset_ctrl);
 
        mdiodev->bus->mdio_map[mdiodev->addr] = NULL;
@@ -814,9 +815,6 @@ void mdiobus_unregister(struct mii_bus *bus)
                if (!mdiodev)
                        continue;
 
-               if (mdiodev->reset_gpio)
-                       gpiod_put(mdiodev->reset_gpio);
-
                mdiodev->device_remove(mdiodev);
                mdiodev->device_free(mdiodev);
        }