linux-kernel - Re: [PATCH v2 1/2] of: property: Fix create device links for all child-supplier dependencies

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Message-ID: <CAGETcx88KCPRHEJWkBfkp1CUKzFvfssfJrvymgVbOg_BJfyhrw@mail.gmail.com>
Date:   Fri, 17 Apr 2020 13:56:37 -0700
From:   Saravana Kannan <saravanak@...gle.com>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] of: property: Fix create device links for all
 child-supplier dependencies

On Fri, Apr 17, 2020 at 9:54 AM Nicolas Saenz Julienne
<nsaenzjulienne@...e.de> wrote:
>
> Upon adding a new device from a DT node, we scan its properties and its
> children's properties in order to create a consumer/supplier
> relationship between the device and the property provider.
>
> That said, it's possible for some of the node's children to be disabled,
> which will create links that'll never be fulfilled.
>
> To get around this, use the for_each_available_child_of_node() function
> instead of for_each_available_node() when iterating over the node's
> children.
>
> Fixes: d4387cd11741 ("of: property: Create device links for all child-supplier depencencies")
> Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
>
> ---
>
> Changes since v1:
>  - Slightly reword description
>
>  drivers/of/property.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/of/property.c b/drivers/of/property.c
> index 252e4f6001553..dc034eb45defd 100644
> --- a/drivers/of/property.c
> +++ b/drivers/of/property.c
> @@ -1298,7 +1298,7 @@ static int of_link_to_suppliers(struct device *dev,
>                 if (of_link_property(dev, con_np, p->name))
>                         ret = -ENODEV;
>
> -       for_each_child_of_node(con_np, child)
> +       for_each_available_child_of_node(con_np, child)
>                 if (of_link_to_suppliers(dev, child) && !ret)
>                         ret = -EAGAIN;
>

Reviewed-by: Saravana Kannan <saravanak@...gle.com>