aboutsummaryrefslogtreecommitdiff
path: root/drivers/acpi/processor_core.c
diff options
context:
space:
mode:
authorJulia Lawall <julia@diku.dk>2008-03-27 01:48:22 -0400
committerLen Brown <len.brown@intel.com>2008-03-27 01:48:22 -0400
commit1192aeb957402b45f311895f124e4ca41206843c (patch)
tree877e5ac536ba87cdfe441c95c49e04f7bc8c63a4 /drivers/acpi/processor_core.c
parent86d9fc1293aa9456677eab94e9fd2d3a10920548 (diff)
ACPI: drivers/acpi: 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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/processor_core.c')
-rw-r--r--drivers/acpi/processor_core.c30
1 files changed, 14 insertions, 16 deletions
diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 36a68fa114e..3a136f6c66a 100644
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -674,22 +674,20 @@ static int __cpuinit acpi_processor_start(struct acpi_device *device)
result = PTR_ERR(pr->cdev);
goto end;
}
- if (pr->cdev) {
- printk(KERN_INFO PREFIX
- "%s is registered as cooling_device%d\n",
- device->dev.bus_id, pr->cdev->id);
-
- result = sysfs_create_link(&device->dev.kobj,
- &pr->cdev->device.kobj,
- "thermal_cooling");
- if (result)
- return result;
- result = sysfs_create_link(&pr->cdev->device.kobj,
- &device->dev.kobj,
- "device");
- if (result)
- return result;
- }
+ printk(KERN_INFO PREFIX
+ "%s is registered as cooling_device%d\n",
+ device->dev.bus_id, pr->cdev->id);
+
+ result = sysfs_create_link(&device->dev.kobj,
+ &pr->cdev->device.kobj,
+ "thermal_cooling");
+ if (result)
+ return result;
+ result = sysfs_create_link(&pr->cdev->device.kobj,
+ &device->dev.kobj,
+ "device");
+ if (result)
+ return result;
if (pr->flags.throttling) {
printk(KERN_INFO PREFIX "%s [%s] (supports",