linux-kernel - Re: [PATCH 2/2] clk: imx: clk-imx8mp: add error handling of of_clk_add_hw

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Date:   Fri, 28 Apr 2023 15:55:31 +0800
From:   Peng Fan <peng.fan@....nxp.com>
To:     Yuxing Liu <lyx2022@...t.edu.cn>, Abel Vesa <abelvesa@...nel.org>,
        Peng Fan <peng.fan@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>
Cc:     hust-os-kernel-patches@...glegroups.com,
        Dongliang Mu <dzm91@...t.edu.cn>, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] clk: imx: clk-imx8mp: add error handling of
 of_clk_add_hw_provider



On 4/24/2023 5:24 PM, Yuxing Liu wrote:
> Referring to clk-imx8mq.c, check the return code of of_clk_add_hw_provider,
> if it returns negtive, print error info and unregister hws,
> which makes the program more robust.

Patch 1 & 2 merged into 1 patch, no need seperate.

Regards,
Peng.

> 
> Signed-off-by: Yuxing Liu <lyx2022@...t.edu.cn>
> Reviewed-by: Dongliang Mu <dzm91@...t.edu.cn>
> ---
> This patch is untested on real device.
> ---
>   drivers/clk/imx/clk-imx8mp.c | 8 +++++++-
>   1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/clk/imx/clk-imx8mp.c b/drivers/clk/imx/clk-imx8mp.c
> index 353d58b665f9..de7d2d2176be 100644
> --- a/drivers/clk/imx/clk-imx8mp.c
> +++ b/drivers/clk/imx/clk-imx8mp.c
> @@ -414,6 +414,7 @@ static int imx8mp_clocks_probe(struct platform_device *pdev)
>   	struct device *dev = &pdev->dev;
>   	struct device_node *np;
>   	void __iomem *anatop_base, *ccm_base;
> +	int err;
>   
>   	np = of_find_compatible_node(NULL, NULL, "fsl,imx8mp-anatop");
>   	anatop_base = devm_of_iomap(dev, np, 0, NULL);
> @@ -717,7 +718,12 @@ static int imx8mp_clocks_probe(struct platform_device *pdev)
>   
>   	imx_check_clk_hws(hws, IMX8MP_CLK_END);
>   
> -	of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_hw_data);
> +	err = of_clk_add_hw_provider(np, of_clk_hw_onecell_get, clk_hw_data);
> +	if (err < 0) {
> +		dev_err(dev, "failed to register hws for i.MX8MP\n");
> +		imx_unregister_hw_clocks(hws, IMX8MP_CLK_END);
> +		return err;
> +	}
>   
>   	imx_register_uart_clocks();
>