From: Johan Hovold <johan@kernel.org>
To: Linus Walleij <linus.walleij@linaro.org>
Cc: Andrew Lunn <andrew@lunn.ch>,
Vivien Didelot <vivien.didelot@gmail.com>,
Florian Fainelli <f.fainelli@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Johan Hovold <johan@kernel.org>, stable <stable@vger.kernel.org>
Subject: [PATCH] net: dsa: realtek-smi: fix OF child-node lookup
Date: Wed, 16 Jan 2019 11:27:08 +0100 [thread overview]
Message-ID: <20190116102708.30608-1-johan@kernel.org> (raw)
Use the new of_get_compatible_child() helper to look up child nodes to
avoid ever matching non-child nodes elsewhere in the tree.
Also fix up the related struct device_node leaks.
Fixes: d8652956cf37 ("net: dsa: realtek-smi: Add Realtek SMI driver")
Cc: stable <stable@vger.kernel.org> # 4.19: 36156f9241cb0
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
Note that this one has only been compile tested.
drivers/net/dsa/realtek-smi.c | 18 +++++++++++++-----
1 file changed, 13 insertions(+), 5 deletions(-)
diff --git a/drivers/net/dsa/realtek-smi.c b/drivers/net/dsa/realtek-smi.c
index b4b839a1d095..ad41ec63cc9f 100644
--- a/drivers/net/dsa/realtek-smi.c
+++ b/drivers/net/dsa/realtek-smi.c
@@ -347,16 +347,17 @@ int realtek_smi_setup_mdio(struct realtek_smi *smi)
struct device_node *mdio_np;
int ret;
- mdio_np = of_find_compatible_node(smi->dev->of_node, NULL,
- "realtek,smi-mdio");
+ mdio_np = of_get_compatible_child(smi->dev->of_node, "realtek,smi-mdio");
if (!mdio_np) {
dev_err(smi->dev, "no MDIO bus node\n");
return -ENODEV;
}
smi->slave_mii_bus = devm_mdiobus_alloc(smi->dev);
- if (!smi->slave_mii_bus)
- return -ENOMEM;
+ if (!smi->slave_mii_bus) {
+ ret = -ENOMEM;
+ goto err_put_node;
+ }
smi->slave_mii_bus->priv = smi;
smi->slave_mii_bus->name = "SMI slave MII";
smi->slave_mii_bus->read = realtek_smi_mdio_read;
@@ -371,10 +372,15 @@ int realtek_smi_setup_mdio(struct realtek_smi *smi)
if (ret) {
dev_err(smi->dev, "unable to register MDIO bus %s\n",
smi->slave_mii_bus->id);
- of_node_put(mdio_np);
+ goto err_put_node;
}
return 0;
+
+err_put_node:
+ of_node_put(mdio_np);
+
+ return ret;
}
static int realtek_smi_probe(struct platform_device *pdev)
@@ -457,6 +463,8 @@ static int realtek_smi_remove(struct platform_device *pdev)
struct realtek_smi *smi = dev_get_drvdata(&pdev->dev);
dsa_unregister_switch(smi->ds);
+ if (smi->slave_mii_bus)
+ of_node_put(smi->slave_mii_bus->dev.of_node);
gpiod_set_value(smi->reset, 1);
return 0;
--
2.20.1
next reply other threads:[~2019-01-16 10:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-16 10:27 Johan Hovold [this message]
2019-01-16 15:05 ` [PATCH] net: dsa: realtek-smi: fix OF child-node lookup Andrew Lunn
2019-01-17 22:05 ` David Miller
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