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Date: Tue, 5 May 2015 11:29:05 +0100
From: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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To: Hanjun Guo <hanjun.guo@linaro.org>
CC: "Rafael J. Wysocki" <rjw@rjwysocki.net>, Will Deacon <will.deacon@arm.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        "Boris Ostrovsky" <boris.ostrovsky@oracle.com>,
        Stefano Stabellini <stefano.stabellini@eu.citrix.com>,
        Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
        Sudeep Holla <Sudeep.Holla@arm.com>, <linux-acpi@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <linaro-acpi@lists.linaro.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
        David Vrabel <david.vrabel@citrix.com>
Subject: Re: [PATCH v2 5/7] Xen / ACPI / processor: Remove unneeded NULL
 check in xen_acpi_processor_enable()
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 <1430793998-21631-6-git-send-email-hanjun.guo@linaro.org>
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CC'ing Konrad and David.

On Tue, 5 May 2015, 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@linaro.org>
> CC: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> CC: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
> ---
>  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
>