diff options
| author | Nicolas Palix <npalix@diku.dk> | 2009-01-06 14:41:35 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-06 15:59:18 -0800 |
| commit | 44ea9c809db6cd373448e77c4be424b534f2051f (patch) | |
| tree | c6da991aec04d7c78edfff70df0b7fd4d6c88c6e /drivers/macintosh | |
| parent | 89fac11cb3e7c5860c425dba14845c09ccede39d (diff) | |
| download | linux-44ea9c809db6cd373448e77c4be424b534f2051f.tar.bz2 | |
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 <npalix@diku.dk>
Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/macintosh')
| -rw-r--r-- | drivers/macintosh/therm_adt746x.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/macintosh/therm_adt746x.c b/drivers/macintosh/therm_adt746x.c index 22bf981d393b..82607add69a9 100644 --- a/drivers/macintosh/therm_adt746x.c +++ b/drivers/macintosh/therm_adt746x.c @@ -554,7 +554,7 @@ thermostat_init(void) const u32 *prop; int i = 0, offset = 0; int err; - + np = of_find_node_by_name(NULL, "fan"); if (!np) return -ENODEV; @@ -613,13 +613,13 @@ thermostat_init(void) } 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); |