[PATCH] usb: i.MX: improve regulator handling

[Marco Felsch]

Hi Uwe,

On 20-10-20 13:15, Uwe Kleine-König wrote:
> Instead of just ignoring errors related to regulator getting error out.
> In case there is no regulator in the device tree, regulator_get() returns
> the dummy regulator and not an error code, so the change is right for
> this situation, too.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
> ---
>  drivers/usb/imx/chipidea-imx.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/usb/imx/chipidea-imx.c b/drivers/usb/imx/chipidea-imx.c
> index 786beede6d89..dd0e3c1a2a58 100644
> --- a/drivers/usb/imx/chipidea-imx.c
> +++ b/drivers/usb/imx/chipidea-imx.c
> @@ -267,8 +267,11 @@ static int imx_chipidea_probe(struct device_d *dev)
>  	}
>  
>  	ci->vbus = regulator_get(dev, "vbus");
> -	if (IS_ERR(ci->vbus))
> -		ci->vbus = NULL;
> +	if (IS_ERR(ci->vbus)) {
> +		ret = ERR_PTR(ci->vbus);
> +		dev_err(dev, "Cannot get vbus regulator: %s\n", strerror(-ret));
> +		return ret;

Returning the error here can cause problems with exisiting boards, e.g.
if the regulator support is missing for the specified vbus regulator.
This is often the case since we have very limited regulator support for
now.

Regards,
  Marco

> +	}