linux-kernel - Re: [PATCH v2] of: __of_update_property_sysfs only call __of_sysfs_remove_bin_file if of_node_is

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Message-ID: <c0bcc2c1-3058-db4d-ca4d-4e56c502891b@gmail.com>
Date:   Fri, 7 Sep 2018 13:00:42 -0700
From:   Frank Rowand <frowand.list@...il.com>
To:     Andre Kalb <Andre.Kalb@....de>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] of: __of_update_property_sysfs only call
 __of_sysfs_remove_bin_file if of_node_is_attached

Hi Andred,

On 09/04/18 08:51, Andre Kalb wrote:
> To prevent warning "kernfs: can not remove '(null)', no directory" if an overlay isn't applied to the active devicetree.
> 
> Using of_remove_property and then of_add_property doesn't show the warning.
> 
> Signed-off-by: Andre Kalb <Andre.Kalb@....de>
> ---
> Changes in v2:
>   - Fix typo
> 
>  drivers/of/kobj.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/of/kobj.c b/drivers/of/kobj.c index 7a0a18980b98..962b660e8ad1 100644
> --- a/drivers/of/kobj.c
> +++ b/drivers/of/kobj.c
> @@ -104,7 +104,7 @@ void __of_update_property_sysfs(struct device_node *np, struct property *newprop
>                 struct property *oldprop)
>  {
>         /* At early boot, bail out and defer setup to of_init() */
> -       if (!of_kset)
> +       if (!of_kset || !of_node_is_attached(np))
>                 return;
> 
>         if (oldprop)
> --
> 2.17.1
> 
> 
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What is the calling path that results in the warning?

-Frank