On Fri, 18 Mar 2011, Paul Zimmerman wrote:
> > --- a/drivers/usb/gadget/audio.c
> > +++ b/drivers/usb/gadget/audio.c
> > @@ -52,7 +52,7 @@ static struct usb_device_descriptor device_desc = {
> > .bLength = sizeof device_desc,
> > .bDescriptorType = USB_DT_DEVICE,
> >
> > - .bcdUSB = __constant_cpu_to_le16(0x200),
> > + .bcdUSB = cpu_to_le16(0x0300),
> >
> > .bDeviceClass = USB_CLASS_PER_INTERFACE,
> > .bDeviceSubClass = 0,
>
> This won't work. Now the gadget will not be recognized by a USB 2.0
> host.
Why not? I'm not aware of any hosts that will refuse to work with a
device merely because the bcdUSB field says 0x0300 instead of 0x0200.
For that matter, there are plenty of legacy hosts that don't have
high-speed USB support. Their controllers are only at the USB-1.1
level, but that doesn't stop them from using USB-2.0 devices at full
speed.
Alan Stern
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