linux-kernel - [PATCH 3/7] staging: fsl-dpaa2/ethsw: Remove netdevice on port probing error

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Date:   Wed, 6 Feb 2019 11:52:00 +0000
From:   Ioana Ciornei <ioana.ciornei@....com>
To:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:     Ioana Ciocoi Radulescu <ruxandra.radulescu@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Ioana Ciornei <ioana.ciornei@....com>
Subject: [PATCH 3/7] staging: fsl-dpaa2/ethsw: Remove netdevice on port
 probing error

From: Razvan Stefanescu <razvan.stefanescu@....com>

If the ethsw_port_init() call failed, the netdevice remains registered in
the system.

Use labels to ensure that netdevice is unregistered and freed in this case.

Signed-off-by: Razvan Stefanescu <razvan.stefanescu@....com>
Signed-off-by: Ioana Ciornei <ioana.ciornei@....com>
---
 drivers/staging/fsl-dpaa2/ethsw/ethsw.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
index d15d03b..fa3af4a 100644
--- a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
+++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
@@ -1445,13 +1445,23 @@ static int ethsw_probe_port(struct ethsw_core *ethsw, u16 port_idx)
 	err = register_netdev(port_netdev);
 	if (err < 0) {
 		dev_err(dev, "register_netdev error %d\n", err);
-		free_netdev(port_netdev);
-		return err;
+		goto err_register_netdev;
 	}
 
 	ethsw->ports[port_idx] = port_priv;
 
-	return ethsw_port_init(port_priv, port_idx);
+	err = ethsw_port_init(port_priv, port_idx);
+	if (err)
+		goto err_ethsw_port_init;
+
+	return 0;
+
+err_ethsw_port_init:
+	unregister_netdev(port_netdev);
+err_register_netdev:
+	free_netdev(port_netdev);
+
+	return err;
 }
 
 static int ethsw_probe(struct fsl_mc_device *sw_dev)
-- 
1.9.1