> > static int dummy_hcd_probe(struct platform_device *pdev)
> > {
> >- struct usb_hcd *hcd;
> >+ struct usb_hcd *hs_hcd;
> >+ struct usb_hcd *ss_hcd;
> > int retval;
> >
> > dev_info(&pdev->dev, "%s, driver " DRIVER_VERSION "\n",
> driver_desc);
> >
> >- hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev-
> >dev));
> >- if (!hcd)
> >+ hs_hcd = usb_create_hcd(&dummy_hcd, &pdev->dev, dev_name(&pdev-
> >dev));
> >+ if (!hs_hcd)
> > return -ENOMEM;
> >- the_controller = hcd_to_dummy (hcd);
> >
> >- retval = usb_add_hcd(hcd, 0, 0);
> >- if (retval != 0) {
> >- usb_put_hcd (hcd);
> >- the_controller = NULL;
> >+ hs_hcd->speed = HCD_USB2;
> Why do you overwrite the speed here and in ->reset()?
You're right. No need for this. I'll remove the above line and the speed
will be set at dummy_setup (->reset())
> >+
> >+ retval = usb_add_hcd(hs_hcd, 0, IRQF_DISABLED | IRQF_SHARED);
> Why IRQF_DISABLED | IRQF_SHARED? you don't interrupts at all.
I used xhci as reference for this patch. This is the way xhci driver adds
the hcds. You can find it in xhci_pci_probe().
I'm not very familiar with how this two hcds (main and shared shcd) will
work together so I thought these flags are needed for their co-operation.
Was my assumption mistaken? What flags should I use?
Also, Sergei pointed out that IRQF_DISABLED is deprecated so it seems to me
that xhci needs an update as well....
> >+ if (retval != 0)
> >+ usb_put_hcd(hs_hcd);
> Your error recovery is broken here. You have to leave instead of
> continue with SS.
>
Thanks for catching that!
Best regards,
Tanya Brokhman
Consultant for Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum
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