linux-kernel - Re: [PATCH V2] clk: socfpga: err out if of_clk_add_provider() failed in __socfpga_pll

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Date:   Mon, 7 Jun 2021 17:08:01 +0800
From:   "yukuai (C)" <yukuai3@...wei.com>
To:     <dinguyen@...nel.org>, <mturquette@...libre.com>,
        <sboyd@...nel.org>
CC:     <linux-clk@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <yi.zhang@...wei.com>
Subject: Re: [PATCH V2] clk: socfpga: err out if of_clk_add_provider() failed
 in __socfpga_pll_init()

ping ...

On 2021/06/02 16:42, Yu Kuai wrote:
> __socfpga_pll_init() should fail if of_clk_add_provider() failed.
> remove 'rc' in the meantime to avoid gcc
> '-Wunused-but-set-variable' warning.
> 
> Signed-off-by: Yu Kuai <yukuai3@...wei.com>
> ---
> changes in V2:
>   - remove 'rc' and use err' instead of 'rc'
>   - err out if of_clk_add_provider() failed
> 
>   drivers/clk/socfpga/clk-pll.c | 15 +++++++++------
>   1 file changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/clk/socfpga/clk-pll.c b/drivers/clk/socfpga/clk-pll.c
> index dcb573d44034..5a9eec2eca80 100644
> --- a/drivers/clk/socfpga/clk-pll.c
> +++ b/drivers/clk/socfpga/clk-pll.c
> @@ -80,7 +80,6 @@ static __init struct clk_hw *__socfpga_pll_init(struct device_node *node,
>   	const char *parent_name[SOCFPGA_MAX_PARENTS];
>   	struct clk_init_data init;
>   	struct device_node *clkmgr_np;
> -	int rc;
>   	int err;
>   
>   	of_property_read_u32(node, "reg", &reg);
> @@ -110,12 +109,16 @@ static __init struct clk_hw *__socfpga_pll_init(struct device_node *node,
>   	hw_clk = &pll_clk->hw.hw;
>   
>   	err = clk_hw_register(NULL, hw_clk);
> -	if (err) {
> -		kfree(pll_clk);
> -		return ERR_PTR(err);
> -	}
> -	rc = of_clk_add_provider(node, of_clk_src_simple_get, hw_clk);
> +	if (err)
> +		goto err_out;
> +	err = of_clk_add_provider(node, of_clk_src_simple_get, hw_clk);
> +	if (err)
> +		goto err_out;
>   	return hw_clk;
> +
> +err_out:
> +	kfree(pll_clk);
> +	return ERR_PTR(err);
>   }
>   
>   void __init socfpga_pll_init(struct device_node *node)
>