linux-kernel - Re: [PATCH] powerpc/mpc5xxx: Use of_get_next

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Message-ID: <alpine.DEB.2.02.1510112243420.2096@localhost6.localdomain6>
Date:	Sun, 11 Oct 2015 22:44:25 +0200 (CEST)
From:	Julia Lawall <julia.lawall@...6.fr>
To:	Christophe JAILLET <christophe.jaillet@...adoo.fr>
cc:	benh@...nel.crashing.org, paulus@...ba.org, mpe@...erman.id.au,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] powerpc/mpc5xxx: Use of_get_next_parent to simplify
 code

On Sun, 11 Oct 2015, Christophe JAILLET wrote:

> of_get_next_parent can be used to simplify the while() loop and
> avoid the need of a temp variable.

Can you do something with the loop in __of_translate_address, in 
drivers/of/address.c?  Is there not an iterator for this?

julia


> 
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
> ---
>  arch/powerpc/sysdev/mpc5xxx_clocks.c | 5 +----
>  1 file changed, 1 insertion(+), 4 deletions(-)
> 
> diff --git a/arch/powerpc/sysdev/mpc5xxx_clocks.c b/arch/powerpc/sysdev/mpc5xxx_clocks.c
> index f4f0301..5732926 100644
> --- a/arch/powerpc/sysdev/mpc5xxx_clocks.c
> +++ b/arch/powerpc/sysdev/mpc5xxx_clocks.c
> @@ -13,7 +13,6 @@
>  
>  unsigned long mpc5xxx_get_bus_frequency(struct device_node *node)
>  {
> -	struct device_node *np;
>  	const unsigned int *p_bus_freq = NULL;
>  
>  	of_node_get(node);
> @@ -22,9 +21,7 @@ unsigned long mpc5xxx_get_bus_frequency(struct device_node *node)
>  		if (p_bus_freq)
>  			break;
>  
> -		np = of_get_parent(node);
> -		of_node_put(node);
> -		node = np;
> +		node = of_get_next_parent(node);
>  	}
>  	of_node_put(node);
>  
> -- 
> 2.1.4
> 
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