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net: mdio: fix resource leak in mdiobus_register_device()

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[ Upstream commit e6ca8f533ed41129fcf052297718f417f021cc7d ]

Fix a possible leak in mdiobus_register_device() when both a
reset-gpio and a reset-controller are present.
Clean up the already claimed reset-gpio, when the registration of
the reset-controller fails, so when an error code is returned, the
device retains its state before the registration attempt.

Link: https://lore.kernel.org/all/20251106144603.39053c81@kernel.org/
Fixes: 71dd6c0dff ("net: phy: add support for reset-controller")
Signed-off-by: Buday Csaba <buday.csaba@prolan.hu>
Link: https://patch.msgid.link/4b419377f8dd7d2f63f919d0f74a336c734f8fff.1762584481.git.buday.csaba@prolan.hu
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Buday Csaba 2025-11-08 07:49:22 +01:00 • committed by Greg Kroah-Hartman
commit 272c55f512
1 changed files with 4 additions and 1 deletions
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5
drivers/net/phy/mdio_bus.c
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@ -89,8 +89,11 @@ int mdiobus_register_device(struct mdio_device *mdiodev)
return err;
err = mdiobus_register_reset(mdiodev);
if (err)
if (err) {
gpiod_put(mdiodev->reset_gpio);
mdiodev->reset_gpio = NULL;
return err;
}
/* Assert the reset signal */
mdio_device_reset(mdiodev, 1);