[PATCH 1/2] usb: dwc3: core: continue probing if usb phy library returns -ENODEV/-ENXIO

Roger Quadros
2014-01-21T13:53:09Z

On 01/21/2014 12:11 PM, Kishon Vijay Abraham I wrote:
> Since PHYs for dwc3 is optional (not all SoCs that have DWC3 use PHYs),
> do not return from probe if the USB PHY library returns -ENODEV as that
> indicates the platform does not have PHY.
>
> Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Reviewed-by: Roger Quadros <rogerq@ti.com>

cheers,
-roger

> ---
> drivers/usb/dwc3/core.c | 34 ++++++++++++++--------------------
> 1 file changed, 14 insertions(+), 20 deletions(-)
>
> diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
> index a49217a..e009d4e 100644
> --- a/drivers/usb/dwc3/core.c
> +++ b/drivers/usb/dwc3/core.c
> @@ -411,32 +411,26 @@ static int dwc3_probe(struct platform_device *pdev)
>
> if (IS_ERR(dwc->usb2_phy)) {
> ret = PTR_ERR(dwc->usb2_phy);
> -
> - /*
> - * if -ENXIO is returned, it means PHY layer wasn't
> - * enabled, so it makes no sense to return -EPROBE_DEFER
> - * in that case, since no PHY driver will ever probe.
> - */
> - if (ret == -ENXIO)
> + if (ret == -ENXIO || ret == -ENODEV) {
> + dwc->usb2_phy = NULL;
> + } else if (ret == -EPROBE_DEFER) {
> return ret;
> -
> - dev_err(dev, "no usb2 phy configured\n");
> - return -EPROBE_DEFER;
> + } else {
> + dev_err(dev, "no usb2 phy configured\n");
> + return ret;
> + }
> }
>
> if (IS_ERR(dwc->usb3_phy)) {
> ret = PTR_ERR(dwc->usb3_phy);
> -
> - /*
> - * if -ENXIO is returned, it means PHY layer wasn't
> - * enabled, so it makes no sense to return -EPROBE_DEFER
> - * in that case, since no PHY driver will ever probe.
> - */
> - if (ret == -ENXIO)
> + if (ret == -ENXIO || ret == -ENODEV) {
> + dwc->usb3_phy = NULL;
> + } else if (ret == -EPROBE_DEFER) {
> return ret;
> -
> - dev_err(dev, "no usb3 phy configured\n");
> - return -EPROBE_DEFER;
> + } else {
> + dev_err(dev, "no usb3 phy configured\n");
> + return ret;
> + }
> }
>
> dwc->xhci_resources[0].start = res->start;
>