linux-kernel - Re: [PATCH 1/1] of: add NULL parameter check for of_device_is

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Date:	Tue, 13 Mar 2012 07:46:15 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Dong Aisheng <b29396@...escale.com>
CC:	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	rob.herring@...xeda.com
Subject: Re: [PATCH 1/1] of: add NULL parameter check for of_device_is_available

On 03/13/2012 06:40 AM, Dong Aisheng wrote:
> From: Dong Aisheng <dong.aisheng@...aro.org>
> 
> This function will return 1 even the device node passed in
> is NULL which is a little error-prone.
> Change to return 0 if the device node passed in is NULL.
> 
> Signed-off-by: Dong Aisheng <dong.aisheng@...aro.org>

Applied.

Rob

> ---
>  drivers/of/base.c |    3 +++
>  1 files changed, 3 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index 133908a..b9347d8 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -280,6 +280,9 @@ int of_device_is_available(const struct device_node *device)
>  	const char *status;
>  	int statlen;
>  
> +	if (device == NULL)
> +		return 0;
> +
>  	status = of_get_property(device, "status", &statlen);
>  	if (status == NULL)
>  		return 1;

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