[PATCH] qmi-firmware-update: support USB3->USB2 mode changes during upgrade

[Paul Gildea]

Yep, was fairly clear from your patch, nice! I guess that depends on
prevalence of congruent S/N's (at least for modems where that will be
needed, unlike your EM7565 which upgrades in SuperSpeed).
My ports seem predictable for manual setting, and if not at least the user
can solve it with trial/error to get around the problem.



On 25 January 2018 at 18:16, Bjørn Mork <bjorn at mork.no> wrote:

> Paul Gildea <gildeap at tcd.ie> writes:
>
> > /sys/bus/usb/devices/usb1/1-0:1.0/usb1-port1/location:0x80000001
> ..
> > /sys/bus/usb/devices/usb2/2-0:1.0/usb2-port2/location:0x80000010
>
> Thanks.  At least this explains why Linux can't figure out that these
> ports share the same physical connector.
>
> What we do about that is another question. This isn't something we can
> fix. Maybe fall back to serial number matching? Or allow the user to
> manually set the expected USB port for QDL?  Or all three?
>
>
>
> Bjørn
>
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