Re: [PATCH] net: dsa: microchip: fix mdio parent bus reference leak

Hi,

On Fri, Nov 21, 2025 at 12:20:00PM +0800, Ma Ke wrote:

In ksz_mdio_register(), when of_mdio_find_bus() is called to get the parent MDIO bus, it increments the reference count of the underlying device. However, the reference are not released in error paths or during switch teardown, causing a reference leak.

Add put_device() in the error path of ksz_mdio_register() and ksz_teardown() to release the parent bus.

Found by code review.

Cc: stable@vger.kernel.org Fixes: 9afaf0eec2ab ("net: dsa: microchip: Refactor MDIO handling for side MDIO access") Signed-off-by: Ma Ke make24@iscas.ac.cn

Reviewed-by: Oleksij Rempel o.rempel@pengutronix.de

Thank you!

Best Regards, Oleksij