linux-kernel - Re: [PATCH 1/2] clk: versatile: test returned value

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Date:	Wed, 08 Apr 2015 11:25:52 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Julia Lawall <Julia.Lawall@...6.fr>,
	Mike Turquette <mturquette@...aro.org>,
	Linus Walleij <linus.walleij@...aro.org>
CC:	kernel-janitors@...r.kernel.org, linux-clk@...r.kernel.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] clk: versatile: test returned value

On 04/04/15 07:59, Julia Lawall wrote:
> Put NULL test on the result of the previous call instead on one of its
> arguments.  A simplified version of the semantic match that finds this
> problem is as follows (http://coccinelle.lip6.fr/):
>
> // <smpl>
> r@
> expression *e1;
> expression *e2;
> identifier f;
> statement S1,S2;
> @@
>
> e1 = f(...,e2,...);
> (
> if (e1 == NULL || ...) S1 else S2
> |
> *if (e2 == NULL || ...) S1 else S2
> )
> // </smpl>
>
> Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>
>
> ---

Looks right. Linus?

>  drivers/clk/versatile/clk-versatile.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/clk/versatile/clk-versatile.c b/drivers/clk/versatile/clk-versatile.c
> index a76981e..7a4f863 100644
> --- a/drivers/clk/versatile/clk-versatile.c
> +++ b/drivers/clk/versatile/clk-versatile.c
> @@ -69,7 +69,7 @@ static void __init cm_osc_setup(struct device_node *np,
>  		struct device_node *parent;
>  
>  		parent = of_get_parent(np);
> -		if (!np) {
> +		if (!parent) {
>  			pr_err("no parent on core module clock\n");
>  			return;
>  		}
>


-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project

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