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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "stable@vger.kernel.org" <stable@vger.kernel.org>
CC:     Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
        "David S . Miller" <davem@davemloft.net>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL for 4.14 101/110] mdio-sun4i: Fix a memory leak
Thread-Topic: [PATCH AUTOSEL for 4.14 101/110] mdio-sun4i: Fix a memory leak
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Date:   Sat, 3 Feb 2018 18:01:31 +0000
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From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>

[ Upstream commit 56c0290202ab94a2f2780c449395d4ae8495fab4 ]

If the probing of the regulator is deferred, the memory allocated by
'mdiobus_alloc_size()' will be leaking.
It should be freed before the next call to 'sun4i_mdio_probe()' which will
reallocate it.

Fixes: 4bdcb1dd9feb ("net: Add MDIO bus driver for the Allwinner EMAC")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 drivers/net/phy/mdio-sun4i.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/phy/mdio-sun4i.c b/drivers/net/phy/mdio-sun4i.c
index 135296508a7e..6425ce04d3f9 100644
--- a/drivers/net/phy/mdio-sun4i.c
+++ b/drivers/net/phy/mdio-sun4i.c
@@ -118,8 +118,10 @@ static int sun4i_mdio_probe(struct platform_device *pd=
ev)
=20
 	data->regulator =3D devm_regulator_get(&pdev->dev, "phy");
 	if (IS_ERR(data->regulator)) {
-		if (PTR_ERR(data->regulator) =3D=3D -EPROBE_DEFER)
-			return -EPROBE_DEFER;
+		if (PTR_ERR(data->regulator) =3D=3D -EPROBE_DEFER) {
+			ret =3D -EPROBE_DEFER;
+			goto err_out_free_mdiobus;
+		}
=20
 		dev_info(&pdev->dev, "no regulator found\n");
 		data->regulator =3D NULL;
--=20
2.11.0