From: Julia Lawall <julia@diku.dk>
Date: Fri, 11 Sep 2009 06:22:09 +0000 (+0000)
Subject: drivers/net/phy: introduce missing kfree
X-Git-Tag: v3.0~8034^2~16
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a4b11649618ef5366ee553f4083449d6bee5d8ec;p=platform%2Fkernel%2Flinux-amlogic.git

drivers/net/phy: introduce missing kfree

Error handling code following a kzalloc should free the allocated data.

The semantic match that finds the problem is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@r exists@
local idexpression x;
statement S;
expression E;
identifier f,f1,l;
position p1,p2;
expression *ptr != NULL;
@@

x@p1 = \(kmalloc\|kzalloc\|kcalloc\)(...);
...
if (x == NULL) S
<... when != x
     when != if (...) { <+...x...+> }
(
x->f1 = E
|
 (x->f1 == NULL || ...)
|
 f(...,x->f1,...)
)
...>
(
 return \(0\|<+...x...+>\|ptr\);
|
 return@p2 ...;
)

@script:python@
p1 << r.p1;
p2 << r.p2;
@@

print "* file: %s kmalloc %s return %s" % (p1[0].file,p1[0].line,p2[0].line)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/phy/mdio-gpio.c b/drivers/net/phy/mdio-gpio.c
index 22cdd45..250e10f 100644
--- a/drivers/net/phy/mdio-gpio.c
+++ b/drivers/net/phy/mdio-gpio.c
@@ -211,7 +211,7 @@ static int __devinit mdio_ofgpio_probe(struct of_device *ofdev,
 
 	new_bus = mdio_gpio_bus_init(&ofdev->dev, pdata, pdata->mdc);
 	if (!new_bus)
-		return -ENODEV;
+		goto out_free;
 
 	ret = of_mdiobus_register(new_bus, ofdev->node);
 	if (ret)