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ACPI fan: extract return values using PTR_ERR

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Need to extract errors using PTR_ERR macro and
process accordingly.  thermal_cooling_device_register
returning NULL means that CONFIG_THERMAL=n and in that
case no need to create symbolic links.

Signed-off-by: Thomas Sujith <sujith.thomas@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Thomas Sujith 2008-02-15 01:01:52 -05:00 committed by Len Brown
parent 3e6fda5c11
commit 19b36780ee
1 changed files with 18 additions and 12 deletions
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30
drivers/acpi/fan.c
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@ -256,22 +256,28 @@ static int acpi_fan_add(struct acpi_device *device)
cdev = thermal_cooling_device_register("Fan", device,
&fan_cooling_ops);
if (cdev)
if (IS_ERR(cdev)) {
result = PTR_ERR(cdev);
goto end;
}
if (cdev) {
printk(KERN_INFO PREFIX
"%s is registered as cooling_device%d\n",
device->dev.bus_id, cdev->id);
else
goto end;
acpi_driver_data(device) = cdev;
result = sysfs_create_link(&device->dev.kobj, &cdev->device.kobj,
"thermal_cooling");
if (result)
return result;
result = sysfs_create_link(&cdev->device.kobj, &device->dev.kobj,
"device");
if (result)
return result;
acpi_driver_data(device) = cdev;
result = sysfs_create_link(&device->dev.kobj,
&cdev->device.kobj,
"thermal_cooling");
if (result)
return result;
result = sysfs_create_link(&cdev->device.kobj,
&device->dev.kobj,
"device");
if (result)
return result;
}
result = acpi_fan_add_fs(device);
if (result)