Index: linux-2.6.23-rc6/drivers/usb/serial/usb-serial.c
===================================================================
--- linux-2.6.23-rc6.orig/drivers/usb/serial/usb-serial.c	2007-09-21 16:23:52.000000000 +0800
+++ linux-2.6.23-rc6/drivers/usb/serial/usb-serial.c	2007-09-21 16:24:09.000000000 +0800
@@ -58,6 +58,7 @@
    drivers depend on it.
 */
 
+static ushort maxSize = 0;
 static int debug;
 static struct usb_serial *serial_table[SERIAL_TTY_MINORS];	/* initially all NULL */
 static DEFINE_MUTEX(table_lock);
@@ -866,7 +867,7 @@
 			dev_err(&interface->dev, "No free urbs available\n");
 			goto probe_error;
 		}
-		buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+		buffer_size = (endpoint->wMaxPacketSize > maxSize) ? endpoint->wMaxPacketSize : maxSize;
 		port->bulk_in_size = buffer_size;
 		port->bulk_in_endpointAddress = endpoint->bEndpointAddress;
 		port->bulk_in_buffer = kmalloc (buffer_size, GFP_KERNEL);
@@ -1276,3 +1277,5 @@
 
 module_param(debug, bool, S_IRUGO | S_IWUSR);
 MODULE_PARM_DESC(debug, "Debug enabled or not");
+module_param(maxSize, ushort,0);
+MODULE_PARM_DESC(maxSize,"User specified USB endpoint size");