ieee802154: fix error handling in ieee802154fake_probe()

In case of any failure ieee802154fake_probe() just calls unregister_netdev().
But it does not look safe to unregister netdevice before it was registered.

The patch implements straightforward resource deallocation in case of
failure in ieee802154fake_probe().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 8 insertions, 5 deletions

diff --git a/drivers/net/ieee802154/fakehard.c b/drivers/net/ieee802154/fakehard.c
index 9ce854f43917..6cbc56ad9ff4 100644
--- a/drivers/net/ieee802154/fakehard.c
+++ b/drivers/net/ieee802154/fakehard.c
@@ -377,17 +377,20 @@ static int ieee802154fake_probe(struct platform_device *pdev)
 
         err = wpan_phy_register(phy);
         if (err)
-                goto out;
+                goto err_phy_reg;
 
         err = register_netdev(dev);
-        if (err < 0)
-                goto out;
+        if (err)
+                goto err_netdev_reg;
 
         dev_info(&pdev->dev, "Added ieee802154 HardMAC hardware\n");
         return 0;
 
-out:
-        unregister_netdev(dev);
+err_netdev_reg:
+        wpan_phy_unregister(phy);
+err_phy_reg:
+        free_netdev(dev);
+        wpan_phy_free(phy);
         return err;
 }