On Fri, 2008-02-15 at 10:54 +0530, Thomas, Sujith wrote:
> From: Thomas Sujith <[EMAIL PROTECTED]>
>
> 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 <[EMAIL PROTECTED]>
> ---
>
> drivers/acpi/processor_core.c | 27 ++++++++++++++++-----------
> 1 files changed, 16 insertions(+), 11 deletions(-)
>
> Index: linux-2.6.24/drivers/acpi/processor_core.c
> ===================================================================
> --- linux-2.6.24.orig/drivers/acpi/processor_core.c
> +++ linux-2.6.24/drivers/acpi/processor_core.c
> @@ -670,21 +670,26 @@ static int __cpuinit acpi_processor_star
>
> pr->cdev = thermal_cooling_device_register("Processor", device,
> &processor_cooling_ops);
> - if (pr->cdev)
> + if (IS_ERR(pr->cdev)) {
> + 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);
> - else
> - goto end;
>
> - 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;
> + 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;
> + }
Very good. But is it necessary to check whether the cooling device
exists before it is unregistered?
>
> if (pr->flags.throttling) {
> printk(KERN_INFO PREFIX "%s [%s] (supports",
-
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