Make sure to disable and deregister the switch on late probe errors to
avoid use-after-free when the device-resource-managed switch is freed.
Fixes: 14fceff4771e ("net: dsa: Add Lantiq / Intel DSA driver for vrx200")
Cc: stable <stable@xxxxxxxxxxxxxxx> # 4.20
Cc: Hauke Mehrtens <hauke@xxxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
---
drivers/net/dsa/lantiq_gswip.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/dsa/lantiq_gswip.c b/drivers/net/dsa/lantiq_gswip.c
index 693a67f45bef..b06c41c98de9 100644
--- a/drivers/net/dsa/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq_gswip.c
@@ -1099,7 +1099,7 @@ static int gswip_probe(struct platform_device *pdev)
dev_err(dev, "wrong CPU port defined, HW only supports port: %i",
priv->hw_info->cpu_port);
err = -EINVAL;
- goto mdio_bus;
+ goto disable_switch;
}
platform_set_drvdata(pdev, priv);
@@ -1109,6 +1109,9 @@ static int gswip_probe(struct platform_device *pdev)
(version & GSWIP_VERSION_MOD_MASK) >> GSWIP_VERSION_MOD_SHIFT);
return 0;
+disable_switch:
+ gswip_mdio_mask(priv, GSWIP_MDIO_GLOB_ENABLE, 0, GSWIP_MDIO_GLOB);
+ dsa_unregister_switch(priv->ds);
mdio_bus:
if (mdio_np)
mdiobus_unregister(priv->ds->slave_mii_bus);
--
2.20.1
