linux-kernel - Re: [PATCH 4/5] of: Do not change property state under __of_add

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Message-ID: <20250225144108.GB2279028-robh@kernel.org>
Date: Tue, 25 Feb 2025 08:41:08 -0600
From: Rob Herring <robh@...nel.org>
To: Zijun Hu <zijun_hu@...oud.com>
Cc: Saravana Kannan <saravanak@...gle.com>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, Zijun Hu <quic_zijuhu@...cinc.com>
Subject: Re: [PATCH 4/5] of: Do not change property state under
 __of_add_property() failure

On Mon, Feb 24, 2025 at 10:28:00PM +0800, Zijun Hu wrote:
> From: Zijun Hu <quic_zijuhu@...cinc.com>
> 
> Do not remove the property from list @np->deadprops if
> __of_add_property() encounters -EEXIST failure.

A property can never be on both np->deadprops and np->props.

> 
> Signed-off-by: Zijun Hu <quic_zijuhu@...cinc.com>
> ---
>  drivers/of/base.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/of/base.c b/drivers/of/base.c
> index c810014957e81171675b63f25eaabe391cc903e4..47cae6e48a48a7e1312c25fc5267bcf39102bbe9 100644
> --- a/drivers/of/base.c
> +++ b/drivers/of/base.c
> @@ -1646,9 +1646,6 @@ int __of_add_property(struct device_node *np, struct property *prop)
>  
>  	raw_spin_lock_irqsave(&devtree_lock, flags);
>  
> -	__of_remove_property_from_list(&np->deadprops, prop);
> -
> -	prop->next = NULL;
>  	next = &np->properties;
>  	while (*next) {
>  		if (of_prop_cmp(prop->name, (*next)->name) == 0) {
> @@ -1660,6 +1657,9 @@ int __of_add_property(struct device_node *np, struct property *prop)
>  	}
>  	*next = prop;
>  
> +	__of_remove_property_from_list(&np->deadprops, prop);
> +	prop->next = NULL;
> +
>  out_unlock:
>  	raw_spin_unlock_irqrestore(&devtree_lock, flags);
>  	if (rc)
> 
> -- 
> 2.34.1
>