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| author | Julia Lawall <julia@diku.dk> | 2008-04-29 00:59:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-29 08:06:04 -0700 |
| commit | 3a8ca95e9d62980fd3b41165ec05032c63ce21da (patch) | |
| tree | 885545c795b9bc2c8a542dd78455c178357c7a6c /drivers/misc | |
| parent | 95d8c365b2df2adb904963333a93b15414403ed1 (diff) | |
| download | linux-3a8ca95e9d62980fd3b41165ec05032c63ce21da.tar.gz linux-3a8ca95e9d62980fd3b41165ec05032c63ce21da.tar.bz2 linux-3a8ca95e9d62980fd3b41165ec05032c63ce21da.zip | |
drivers/misc: elide a non-zero test on a result that is never 0
The function thermal_cooling_device_register always returns either a valid
pointer or a value made with ERR_PTR, so a test for non-zero on the result
will always succeed.
The problem was found using the following semantic match.
(http://www.emn.fr/x-info/coccinelle/)
//<smpl>
@a@
expression E, E1;
statement S,S1;
position p;
@@
E = thermal_cooling_device_register(...)
... when != E = E1
if@p (E) S else S1
@n@
position a.p;
expression E,E1;
statement S,S1;
@@
E = NULL
... when != E = E1
if@p (E) S else S1
@depends on !n@
expression E;
statement S,S1;
position a.p;
@@
* if@p (E)
S else S1
//</smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Thomas Sujith <sujith.thomas@intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc')
| -rw-r--r-- | drivers/misc/intel_menlow.c | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/drivers/misc/intel_menlow.c b/drivers/misc/intel_menlow.c index 0c0bb3093e07..80a136352408 100644 --- a/drivers/misc/intel_menlow.c +++ b/drivers/misc/intel_menlow.c @@ -175,19 +175,17 @@ static int intel_menlow_memory_add(struct acpi_device *device) goto end; } - if (cdev) { - acpi_driver_data(device) = cdev; - result = sysfs_create_link(&device->dev.kobj, - &cdev->device.kobj, "thermal_cooling"); - if (result) - goto unregister; - - result = sysfs_create_link(&cdev->device.kobj, - &device->dev.kobj, "device"); - if (result) { - sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); - goto unregister; - } + acpi_driver_data(device) = cdev; + result = sysfs_create_link(&device->dev.kobj, + &cdev->device.kobj, "thermal_cooling"); + if (result) + goto unregister; + + result = sysfs_create_link(&cdev->device.kobj, + &device->dev.kobj, "device"); + if (result) { + sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); + goto unregister; } end: |