From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
commit 227f33beab746aeec4ef3305bd17b1d374df09e7 upstream.
We could end up dereferencing an error pointer when we call
regulator_disable().
Fixes: 4bdcb1dd9feb ('net: Add MDIO bus driver for the Allwinner EMAC')
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Acked-by: Chen-Yu Tsai <wens@xxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/phy/mdio-sun4i.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/net/phy/mdio-sun4i.c
+++ b/drivers/net/phy/mdio-sun4i.c
@@ -134,6 +134,7 @@ static int sun4i_mdio_probe(struct platf
}
dev_info(&pdev->dev, "no regulator found\n");
+ data->regulator = NULL;
} else {
ret = regulator_enable(data->regulator);
if (ret)
@@ -149,7 +150,8 @@ static int sun4i_mdio_probe(struct platf
return 0;
err_out_disable_regulator:
- regulator_disable(data->regulator);
+ if (data->regulator)
+ regulator_disable(data->regulator);
err_out_free_mdiobus:
mdiobus_free(bus);
return ret;
