--- linux-2.6.22.14/drivers/usb/serial/usb-serial.c	2008-01-22 14:03:10.000000000 +0200
+++ linux/drivers/usb/serial/usb-serial.c	2008-01-15 11:04:10.000000000 +0200
@@ -865,6 +865,7 @@ int usb_serial_probe(struct usb_interfac
 			goto probe_error;
 		}
 		buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+		if (type->max_buf_size) buffer_size = type->max_buf_size;
 		port->bulk_in_size = buffer_size;
 		port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
 		port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL);