[PATCH] of: platform: don't fail of_find_device_by_node() if no driver bound

[Sascha Hauer]

On Thu, Sep 14, 2023 at 09:30:18AM +0200, Ahmad Fatoum wrote:
> of_find_device_by_node() may be called by a driver following
> of_platform_populate in order to bind the children to drivers.
> It's thus wrong to return NULL when a device has been found, but no
> driver was registered. That also aligns the function with the
> expectation resulting from its name: A device is found and devices may
> be bound or not.

I hesitated applying this one because I am not sure if some users expect
to have a driver bound when of_find_device_by_node() returns a valid
pointer.

I applied it now, let's see what happens.

Sascha

> 
> Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
> ---
>  drivers/of/platform.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/of/platform.c b/drivers/of/platform.c
> index bd5f2ad82c6b..1f79a539f541 100644
> --- a/drivers/of/platform.c
> +++ b/drivers/of/platform.c
> @@ -23,11 +23,9 @@
>  struct device *of_find_device_by_node(struct device_node *np)
>  {
>  	struct device *dev;
> -	int ret;
>  
> -	ret = of_device_ensure_probed(np);
> -	if (ret)
> -		return NULL;
> +	/* Not having a driver is not an error here */
> +	(void)of_device_ensure_probed(np);
>  
>  	if (deep_probe_is_supported())
>  		return np->dev;
> -- 
> 2.39.2
> 
> 
> 

-- 
Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | http://www.pengutronix.de/  |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |