drivers/macintosh: Add missing of_node_put in therm_adt746x.c

of_node_put is needed before discarding a value received from
of_find_node_by_name, eg in error handling code or when the device node is
no longer used.

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

// <smpl>
@r exists@
local idexpression struct device_node *n;
position p1, p2;
struct device_node *n1;
statement S;
identifier f;
expression E;
expression *ptr != NULL;
@@

n@p1 = of_find_node_by_name(...)
...
if (!n) S
... when != of_node_put(n)
when != n1 = f(n,...)
when != E = n
when any
when strict
(
return \(0\|<+...n...+>\|ptr\);
|
return@p2 ...;
|
of_node_put(n);
|
n1 = f(n,...)
|
E = n
)

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

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

Signed-off-by: Nicolas Palix <[e-mail]>
Signed-off-by: Julia Lawall <[e-mail]>
Acked-by: Stephen Rothwell <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/macintosh/therm_adt746x.c

···
 	const u32 *prop;
 	int i = 0, offset = 0;
 	int err;
-	
+
 	np = of_find_node_by_name(NULL, "fan");
 	if (!np)
 		return -ENODEV;
···
 	}
 
 	of_dev = of_platform_device_create(np, "temperatures", NULL);
-	
+	of_node_put(np);
+
 	if (of_dev == NULL) {
 		printk(KERN_ERR "Can't register temperatures device !\n");
-		of_node_put(np);
 		return -ENODEV;
 	}
-	
+
 	err = device_create_file(&of_dev->dev, &dev_attr_sensor1_temperature);
 	err |= device_create_file(&of_dev->dev, &dev_attr_sensor2_temperature);
 	err |= device_create_file(&of_dev->dev, &dev_attr_sensor1_limit);