linux-kernel - Re: [PATCH v2] clk: imx8qxp: Defer instead of failing probe

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Message-ID: <Zs7gXhohOyQ/abOf@linaro.org>
Date: Wed, 28 Aug 2024 11:31:26 +0300
From: Abel Vesa <abel.vesa@...aro.org>
To: Diogo Manuel Pais Silva <diogo.pais@...ontrol.com>
Cc: Peng Fan <peng.fan@....com>,
	"abelvesa@...nel.org" <abelvesa@...nel.org>,
	"linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
	"shawnguo@...nel.org" <shawnguo@...nel.org>,
	"kernel@...gutronix.de" <kernel@...gutronix.de>,
	"s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"sboyd@...nel.org" <sboyd@...nel.org>,
	"mturquette@...libre.com" <mturquette@...libre.com>,
	"festevam@...il.com" <festevam@...il.com>,
	"imx@...ts.linux.dev" <imx@...ts.linux.dev>,
	"EMC: linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] clk: imx8qxp: Defer instead of failing probe

On 24-07-02 08:10:44, Diogo Manuel Pais Silva wrote:
> When of_clk_parent_fill is ran without all the parent clocks having been probed then the probe function will return -EINVAL, making it so that the probe isn't attempted again. As fw_devlink is on by default this does not usually happen, but if fw_devlink is disabled then it is very possible that the parent clock will be probed after the lpcg first attempt.
> 
> Signed-off-by: Diogo Silva <diogo.pais@...ontrol.com>

This patch doesn't apply cleanly.

Please respin.

Thanks!

> ---
> v2: change from dev_warn to dev_err_probe
> ---
>  drivers/clk/imx/clk-imx8qxp-lpcg.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/clk/imx/clk-imx8qxp-lpcg.c b/drivers/clk/imx/clk-imx8qxp-lpcg.c
> index d0ccaa040225..7bd9b745edbe 100644
> --- a/drivers/clk/imx/clk-imx8qxp-lpcg.c
> +++ b/drivers/clk/imx/clk-imx8qxp-lpcg.c
> @@ -225,8 +225,8 @@ static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev,
>  
>  	ret = of_clk_parent_fill(np, parent_names, count);
>  	if (ret != count) {
> -		dev_err(&pdev->dev, "failed to get clock parent names\n");
> -		return count;
> +		return dev_err_probe(&pdev->dev, -EPROBE_DEFER,
> +				"failed to get all clock parent names\n");
>  	}
>  
>  	ret = of_property_read_string_array(np, "clock-output-names",
> -- 
> 2.34.1