On Friday 08 September 2006 07:30, Alan Stern wrote:
> On Thu, 7 Sep 2006, Iñaky Pérez-González wrote:
> > usb: introduce usb_reenumerate_device()
> >
>
> I don't understand the point of this patch.  Is it simply to export an
> interface to hub_port_logical_disconnect()?

Kind of, yes

> What's wrong with using usb_reset_device()?  You say it will "bring the
> device back to full reset state"; I'm not sure what that means.  Do you
> want to avoid issuing a port reset?  This patch won't help, because
> hub_port_locical_disconnect() will also cause a port reset.  In fact, the
> USB stack can't reenumerate a device without resetting it.

Yep, the initial reset that brings the device back to default state/addr0
always happens. However, it seems like that is not affecting my device as
'badly' (so to speak) as a direct reset with the port enabled. I'd say the
internal logic is considering two different resets: one with the port
disabled, than simply moves in to enable and the one with the port enabled,
that is interpreted as hard-core reset. I wonder if this is common behavior,
and I'll try to check with the USB spec guys tomorrow.

In any case, I am on my way to confirm all this in a CATC.

Greg, would you please hold out that patch until we clarify the issue
further?

Thanks,

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