linux-kernel - [PATCH 4.4 096/312] phy: fix device reference leaks

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Date:   Fri,  8 May 2020 14:31:27 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Florian Fainelli <f.fainelli@...il.com>,
        Johan Hovold <johan@...nel.org>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.4 096/312] phy: fix device reference leaks

From: Johan Hovold <johan@...nel.org>

commit 17ae1c650c1ecf8dc8e16d54b0f68a345965f43f upstream.

Make sure to drop the reference taken by bus_find_device_by_name()
before returning from phy_connect() and phy_attach().

Note that both function still take a reference to the phy device
through phy_attach_direct().

Fixes: e13934563db0 ("[PATCH] PHY Layer fixup")
Cc: Florian Fainelli <f.fainelli@...il.com>
Signed-off-by: Johan Hovold <johan@...nel.org>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/phy/phy_device.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -522,6 +522,7 @@ struct phy_device *phy_connect(struct ne
 	phydev = to_phy_device(d);

 	rc = phy_connect_direct(dev, phydev, handler, interface);
+	put_device(d);
 	if (rc)
 		return ERR_PTR(rc);

@@ -721,6 +722,7 @@ struct phy_device *phy_attach(struct net
 	phydev = to_phy_device(d);

 	rc = phy_attach_direct(dev, phydev, phydev->dev_flags, interface);
+	put_device(d);
 	if (rc)
 		return ERR_PTR(rc);