dsa_loop_drv_probe() takes a reference on the CPU net_device with dev_get_by_name() before calling dsa_register_switch(). The matching dev_put() is only done in dsa_loop_drv_remove(), which the driver core does not call after a failed probe, so every failed registration leaks the reference. Drop the reference when dsa_register_switch() fails. Fixes: 98cd1552ea27 ("net: dsa: Mock-up driver") Cc: stable@vger.kernel.org Assisted-by: DeepSeek-V4.1-Flash and OpenAI Codex Signed-off-by: Wentao Liang --- drivers/net/dsa/dsa_loop.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/dsa/dsa_loop.c b/drivers/net/dsa/dsa_loop.c index 0e35e9841b9b..fd02327b5a56 100644 --- a/drivers/net/dsa/dsa_loop.c +++ b/drivers/net/dsa/dsa_loop.c @@ -390,6 +390,8 @@ static int dsa_loop_drv_probe(struct mdio_device *mdiodev) if (!ret) dev_info(&mdiodev->dev, "%s: 0x%0x\n", pdata->name, pdata->enabled_ports); + else + dev_put(ps->netdev); return ret; } -- 2.34.1