[Bug 249384] Add support for Winbond CDC device in Tenma power supply

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249384

--- Comment #9 from Hans Petter Selasky <hselasky at FreeBSD.org> ---
> ie I guess my patch is not needed but it indicates a regression in the USB stack from 12 to 13.

There are similar devices which need a small delay before the configuration
index can be selected.

Can you try to patch sys/dev/usb/ 's 

usb_error_t
usbd_set_config_index(struct usb_device *udev, uint8_t index)

and just add:

pause("W", hz);

in the beginning?

--HPS

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