Re: [PATCH v3 3/7] Xen / ACPI / processor: Remove unneeded NULL check

[Konrad Rzeszutek Wilk]

On Mon, May 11, 2015 at 12:17:15PM +0800, Hanjun Guo wrote:
> Before xen_acpi_processor_enable() is called, struct acpi_processor *pr is
> allocated in xen_acpi_processor_add() and checked if it's NULL, so no need
> to check again when passed to xen_acpi_processor_enable(), just remove it.
> 
> Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx>
> CC: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
> CC: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>

Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> ---
>  drivers/xen/xen-acpi-cpuhotplug.c | 8 +-------
>  1 file changed, 1 insertion(+), 7 deletions(-)
> 
> diff --git a/drivers/xen/xen-acpi-cpuhotplug.c b/drivers/xen/xen-acpi-cpuhotplug.c
> index 5a62aa0..f4a3694 100644
> --- a/drivers/xen/xen-acpi-cpuhotplug.c
> +++ b/drivers/xen/xen-acpi-cpuhotplug.c
> @@ -46,13 +46,7 @@ static int xen_acpi_processor_enable(struct acpi_device *device)
>  	unsigned long long value;
>  	union acpi_object object = { 0 };
>  	struct acpi_buffer buffer = { sizeof(union acpi_object), &object };
> -	struct acpi_processor *pr;
> -
> -	pr = acpi_driver_data(device);
> -	if (!pr) {
> -		pr_err(PREFIX "Cannot find driver data\n");
> -		return -EINVAL;
> -	}
> +	struct acpi_processor *pr = acpi_driver_data(device);
>  
>  	if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) {
>  		/* Declared with "Processor" statement; match ProcessorID */
> -- 
> 1.9.1
> 
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