6.6-stable review patch. If anyone has any objections, please let me know.
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From: Buday Csaba buday.csaba@prolan.hu
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 6.6, as specified in notes ] Signed-off-by: Bence Csókás csokas.bence@prolan.hu Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/net/phy/mdio_bus.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/net/phy/mdio_bus.c +++ b/drivers/net/phy/mdio_bus.c @@ -99,6 +99,7 @@ int mdiobus_unregister_device(struct mdi 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; @@ -775,9 +776,6 @@ void mdiobus_unregister(struct mii_bus * if (!mdiodev) continue;
- if (mdiodev->reset_gpio) - gpiod_put(mdiodev->reset_gpio); - mdiodev->device_remove(mdiodev); mdiodev->device_free(mdiodev); }