linux-kernel - Re: [PATCH 12/33] clk: bcm2835: use match

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Date:   Mon, 21 May 2018 10:48:58 -0700
From:   Eric Anholt <eric@...olt.net>
To:     Yisheng Xie <xieyisheng1@...wei.com>, linux-kernel@...r.kernel.org
Cc:     Yisheng Xie <xieyisheng1@...wei.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Stefan Wahren <stefan.wahren@...e.com>,
        linux-clk@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 12/33] clk: bcm2835: use match_string() helper

Yisheng Xie <xieyisheng1@...wei.com> writes:

> match_string() returns the index of an array for a matching string,
> which can be used intead of open coded variant.
>
> Cc: Michael Turquette <mturquette@...libre.com>
> Cc: Stephen Boyd <sboyd@...nel.org>
> Cc: Eric Anholt <eric@...olt.net>
> Cc: Stefan Wahren <stefan.wahren@...e.com>
> Cc: linux-clk@...r.kernel.org
> Cc: linux-rpi-kernel@...ts.infradead.org
> Cc: linux-arm-kernel@...ts.infradead.org
> Signed-off-by: Yisheng Xie <xieyisheng1@...wei.com>
> ---
>  drivers/clk/bcm/clk-bcm2835.c | 14 ++++++--------
>  1 file changed, 6 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c
> index fa0d5c8..a27c0d2 100644
> --- a/drivers/clk/bcm/clk-bcm2835.c
> +++ b/drivers/clk/bcm/clk-bcm2835.c
> @@ -1395,8 +1395,7 @@ static struct clk_hw *bcm2835_register_clock(struct bcm2835_cprman *cprman,
>  	struct bcm2835_clock *clock;
>  	struct clk_init_data init;
>  	const char *parents[1 << CM_SRC_BITS];
> -	size_t i, j;
> -	int ret;
> +	int i, ret;
>  
>  	/*
>  	 * Replace our strings referencing parent clocks with the
> @@ -1405,12 +1404,11 @@ static struct clk_hw *bcm2835_register_clock(struct bcm2835_cprman *cprman,
>  	for (i = 0; i < data->num_mux_parents; i++) {
>  		parents[i] = data->parents[i];
>  
> -		for (j = 0; j < ARRAY_SIZE(cprman_parent_names); j++) {
> -			if (strcmp(parents[i], cprman_parent_names[j]) == 0) {
> -				parents[i] = cprman->real_parent_names[j];
> -				break;
> -			}
> -		}
> +		ret = match_string(cprman_parent_names,
> +				   ARRAY_SIZE(cprman_parent_names),
> +				   parents[i]);
> +		if (ret >= 0)
> +			parents[i] = cprman->real_parent_names[ret];

Reviewed-by: Eric Anholt <eric@...olt.net>

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