linux-kernel - Re: [PATCH 02/19] clk: at91: clk-generated: check best

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Message-ID: <20200717091036.GJ3428@piout.net>
Date:   Fri, 17 Jul 2020 11:10:36 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Claudiu Beznea <claudiu.beznea@...rochip.com>
Cc:     mturquette@...libre.com, sboyd@...nel.org,
        nicolas.ferre@...rochip.com, ludovic.desroches@...rochip.com,
        bbrezillon@...nel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 02/19] clk: at91: clk-generated: check best_rate against
 ranges

On 15/07/2020 14:24:10+0300, Claudiu Beznea wrote:
> Check best_rate against available clock ranges.
> 
> Fixes: df70aeef6083 ("clk: at91: add generated clock driver")
> Signed-off-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@...tlin.com>

> ---
>  drivers/clk/at91/clk-generated.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/clk/at91/clk-generated.c b/drivers/clk/at91/clk-generated.c
> index 995a13133cfb..f8e557e0e1b8 100644
> --- a/drivers/clk/at91/clk-generated.c
> +++ b/drivers/clk/at91/clk-generated.c
> @@ -185,8 +185,8 @@ static int clk_generated_determine_rate(struct clk_hw *hw,
>  		 __clk_get_name((req->best_parent_hw)->clk),
>  		 req->best_parent_rate);
>  
> -	if (best_rate < 0)
> -		return best_rate;
> +	if (best_rate < 0 || (gck->range.max && best_rate > gck->range.max))
> +		return -EINVAL;
>  
>  	req->rate = best_rate;
>  	return 0;
> -- 
> 2.7.4
> 

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com