Re: [PATCH v3 1/1] serial: ns16550: move iomem/ioport init after clock init

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

On 17.02.23 15:20, Maxim Kochetkov wrote:
> While probing ns16550 clock provider may be unavailable and
> clk_get() returns -EPROBE_DEFER. Next ns16550_probe() attempts
> will be failed too because of dev_request_mem_resource() has already
> acquired this resource for the device and returns -EBUSY.
> So move resource allocation just after clock init. It will let proper
> probe for defered clocks on boards with deep probe disabled.
> 
> Signed-off-by: Maxim Kochetkov <m.kochetkov@yadro.com>
> Signed-off-by: Maxim Kochetkov <fido_max@inbox.ru>

Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>

Thanks!
Ahmad

> ---
>  drivers/serial/serial_ns16550.c | 14 +++++++-------
>  1 file changed, 7 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/serial/serial_ns16550.c b/drivers/serial/serial_ns16550.c
> index 16f3576645..9ce4feed43 100644
> --- a/drivers/serial/serial_ns16550.c
> +++ b/drivers/serial/serial_ns16550.c
> @@ -479,13 +479,6 @@ static int ns16550_probe(struct device *dev)
>  
>  	priv = xzalloc(sizeof(*priv));
>  
> -	ret = ns16550_init_iomem(dev, priv);
> -	if (ret)
> -		ret = ns16550_init_ioport(dev, priv);
> -
> -	if (ret)
> -		return ret;
> -
>  	if (plat)
>  		priv->plat = *plat;
>  	else
> @@ -511,6 +504,13 @@ static int ns16550_probe(struct device *dev)
>  		goto err;
>  	}
>  
> +	ret = ns16550_init_iomem(dev, priv);
> +	if (ret)
> +		ret = ns16550_init_ioport(dev, priv);
> +
> +	if (ret)
> +		goto err;
> +
>  	cdev = &priv->cdev;
>  	cdev->dev = dev;
>  	cdev->tstc = ns16550_tstc;

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