USB: serial: digi_acceleport: simplify endpoint check

Simplify the endpoint sanity check by letting core verify that the
required endpoints are present.

Note that this driver uses an additional bulk-endpoint pair as an
out-of-band port.

Signed-off-by: Johan Hovold <[e-mail]>

drivers/usb/serial/digi_acceleport.c

···
 	.description =			"Digi 2 port USB adapter",
 	.id_table =			id_table_2,
 	.num_ports =			3,
+	.num_bulk_in =			4,
+	.num_bulk_out =			4,
 	.open =				digi_open,
 	.close =			digi_close,
 	.dtr_rts =			digi_dtr_rts,
···
 	.description =			"Digi 4 port USB adapter",
 	.id_table =			id_table_4,
 	.num_ports =			4,
+	.num_bulk_in =			5,
+	.num_bulk_out =			5,
 	.open =				digi_open,
 	.close =			digi_close,
 	.write =			digi_write,
···
 
 static int digi_startup(struct usb_serial *serial)
 {
-	struct device *dev = &serial->interface->dev;
 	struct digi_serial *serial_priv;
 	int ret;
-	int i;
-
-	/* check whether the device has the expected number of endpoints */
-	if (serial->num_port_pointers < serial->type->num_ports + 1) {
-		dev_err(dev, "OOB endpoints missing\n");
-		return -ENODEV;
-	}
-
-	for (i = 0; i < serial->type->num_ports + 1 ; i++) {
-		if (!serial->port[i]->read_urb) {
-			dev_err(dev, "bulk-in endpoint missing\n");
-			return -ENODEV;
-		}
-		if (!serial->port[i]->write_urb) {
-			dev_err(dev, "bulk-out endpoint missing\n");
-			return -ENODEV;
-		}
-	}
 
 	serial_priv = kzalloc(sizeof(*serial_priv), GFP_KERNEL);
 	if (!serial_priv)