linux-kernel - [PATCH v2 3/6] staging: fsl-dpaa2/ethsw: Remove netdevice on port probing error

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Message-Id: <1562336836-17119-4-git-send-email-ioana.ciornei@nxp.com>
Date:   Fri,  5 Jul 2019 17:27:13 +0300
From:   Ioana Ciornei <ioana.ciornei@....com>
To:     gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org
Cc:     ruxandra.radulescu@....com,
        Razvan Stefanescu <razvan.stefanescu@....com>,
        Ioana Ciornei <ioana.ciornei@....com>
Subject: [PATCH v2 3/6] 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>
---
Changes in v2:
 - none

 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 b2273f840813..9f1617164865 100644
--- a/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
+++ b/drivers/staging/fsl-dpaa2/ethsw/ethsw.c
@@ -1460,13 +1460,23 @@ 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