linux-kernel - Re: [PATCH 2/2] clk: versatile: clk-icst: Ensure clock names are unique

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Date:   Tue, 9 Nov 2021 11:43:42 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Rob Herring <robh@...nel.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Sudeep Holla <sudeep.holla@....com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Subject: Re: [PATCH 2/2] clk: versatile: clk-icst: Ensure clock names are
 unique

On Tue, Nov 09, 2021 at 10:46:50AM -0600, Rob Herring wrote:
> Commit 2d3de197a818 ("ARM: dts: arm: Update ICST clock nodes 'reg' and
> node names") moved to using generic node names. That results in trying
> to register multiple clocks with the same name. Fix this by including
> the unit-address in the clock name.
> 
> Fixes: 2d3de197a818 ("ARM: dts: arm: Update ICST clock nodes 'reg' and node names")
> Cc: stable@...r.kernel.org
> Cc: Linus Walleij <linus.walleij@...aro.org>
> Cc: Stephen Boyd <sboyd@...nel.org>
> Cc: linux-arm-kernel@...ts.infradead.org
> Cc: linux-clk@...r.kernel.org
> Signed-off-by: Rob Herring <robh@...nel.org>

Tested-by: Guenter Roeck <linux@...ck-us.net>

> ---
> This should be applied to stable to minimize DT ABI breakage.
> ---
>  drivers/clk/versatile/clk-icst.c | 6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/clk/versatile/clk-icst.c b/drivers/clk/versatile/clk-icst.c
> index 77fd0ecaf155..d52f976dc875 100644
> --- a/drivers/clk/versatile/clk-icst.c
> +++ b/drivers/clk/versatile/clk-icst.c
> @@ -484,7 +484,7 @@ static void __init of_syscon_icst_setup(struct device_node *np)
>  	struct device_node *parent;
>  	struct regmap *map;
>  	struct clk_icst_desc icst_desc;
> -	const char *name = np->name;
> +	const char *name;
>  	const char *parent_name;
>  	struct clk *regclk;
>  	enum icst_control_type ctype;
> @@ -533,15 +533,17 @@ static void __init of_syscon_icst_setup(struct device_node *np)
>  		icst_desc.params = &icst525_apcp_cm_params;
>  		ctype = ICST_INTEGRATOR_CP_CM_MEM;
>  	} else {
> -		pr_err("unknown ICST clock %s\n", name);
> +		pr_err("unknown ICST clock %pOF\n", np);
>  		return;
>  	}
>  
>  	/* Parent clock name is not the same as node parent */
>  	parent_name = of_clk_get_parent_name(np, 0);
> +	name = kasprintf(GFP_KERNEL, "%pOFP", np);
>  
>  	regclk = icst_clk_setup(NULL, &icst_desc, name, parent_name, map, ctype);
>  	if (IS_ERR(regclk)) {
> +		kfree(name);
>  		pr_err("error setting up syscon ICST clock %s\n", name);
>  		return;
>  	}
> -- 
> 2.32.0
>