hso: fix handling of modem port SERIAL_STATE notifications
The existing serial state notification handling expected older Option devices, having a hardcoded assumption that the Modem port was always USB interface #2. That isn't true for devices from the past few years. hso_serial_state_notification is a local cache of a USB Communications Interface Class SERIAL_STATE notification from the device, and the USB CDC specification (section 6.3, table 67 "Class-Specific Notifications") defines wIndex as the USB interface the event applies to. For hso devices this will always be the Modem port, as the Modem port is the only port which is set up to receive them by the driver. So instead of always expecting USB interface #2, instead validate the notification with the actual USB interface number of the Modem port. Signed-off-by:Dan Williams <dcbw@redhat.com> Tested-by:
H. Nikolaus Schaller <hns@goldelico.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
22d3b76e
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