USB: serial: mxuport: register two ports for unknown devices
Print a message and register two ports for interfaces for which we do not know how many ports there are instead of binding, allocating resources, but not register any ports. This provides a hint that anyone adding a dynamic device id must also provide a reference id (driver info) from which the port count can be retrieved, for example: echo <vid> <pid> 0 0x110A 0x1410 > new_id Signed-off-by: Johan Hovold <johan@kernel.org>
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@ -950,17 +950,23 @@ static int mxuport_calc_num_ports(struct usb_serial *serial,
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struct usb_serial_endpoints *epds)
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struct usb_serial_endpoints *epds)
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{
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{
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unsigned long features = (unsigned long)usb_get_serial_data(serial);
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unsigned long features = (unsigned long)usb_get_serial_data(serial);
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int num_ports;
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if (features & MX_UPORT_2_PORT)
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if (features & MX_UPORT_2_PORT) {
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return 2;
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num_ports = 2;
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if (features & MX_UPORT_4_PORT)
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} else if (features & MX_UPORT_4_PORT) {
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return 4;
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num_ports = 4;
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if (features & MX_UPORT_8_PORT)
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} else if (features & MX_UPORT_8_PORT) {
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return 8;
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num_ports = 8;
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if (features & MX_UPORT_16_PORT)
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} else if (features & MX_UPORT_16_PORT) {
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return 16;
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num_ports = 16;
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} else {
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dev_warn(&serial->interface->dev,
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"unknown device, assuming two ports\n");
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num_ports = 2;
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}
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return 0;
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return num_ports;
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}
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}
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/* Get the version of the firmware currently running. */
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/* Get the version of the firmware currently running. */
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@ -1367,7 +1373,6 @@ static struct usb_serial_driver mxuport_device = {
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},
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},
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.description = "MOXA UPort",
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.description = "MOXA UPort",
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.id_table = mxuport_idtable,
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.id_table = mxuport_idtable,
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.num_ports = 0,
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.probe = mxuport_probe,
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.probe = mxuport_probe,
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.port_probe = mxuport_port_probe,
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.port_probe = mxuport_port_probe,
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.attach = mxuport_attach,
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.attach = mxuport_attach,
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