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SubjectRe: [PATCH v2 10/10] usb: chipidea: tegra: Add USB_TEGRA_PHY module to driver's dependencies
On Fri, Dec 20, 2019 at 07:31:08AM +0300, Dmitry Osipenko wrote:
> 20.12.2019 06:56, Peter Chen пишет:
> > On 19-12-20 04:52:38, Dmitry Osipenko wrote:
[...]
> >> --- a/drivers/usb/chipidea/ci_hdrc_tegra.c
> >> +++ b/drivers/usb/chipidea/ci_hdrc_tegra.c
> >> @@ -53,6 +53,12 @@ static int tegra_udc_probe(struct platform_device *pdev)
> >> struct tegra_udc *udc;
> >> int err;
> >>
> >> + if (IS_MODULE(CONFIG_USB_TEGRA_PHY)) {
> >> + err = request_module("phy_tegra_usb");
> >> + if (err)
> >> + return err;
> >> + }
> >> +
> >
> > Why you do this dependency, if this controller driver can't
> > get USB PHY, it should return error. What's the return value
> > after calling below:
> >
> > udc->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "nvidia,phy", 0);
>
> It returns -EPROBE_DEFER when phy_tegra_usb isn't loaded.

How are other driver modules autoloaded? Isn't there an appropriate
MODALIAS or MODULE_DEVICE_TABLE in there?

Best Regards,
Michał Mirosław

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