--- zzzz-none-000/linux-2.6.19.2/drivers/usb/serial/usb-serial.c	2007-01-10 19:10:37.000000000 +0000
+++ davinci-8020-5505/linux-2.6.19.2/drivers/usb/serial/usb-serial.c	2008-07-14 15:09:16.000000000 +0000
@@ -607,6 +607,20 @@
 		id = usb_match_id(iface, t->id_table);
 		if (id != NULL) {
 			dbg("descriptor matches");
+
+			/* WK AVM Patch: don't use Mass Storage */
+			if (iface->cur_altsetting->desc.bInterfaceClass == 8) {
+				#define HUAWEI_VENDOR_ID                0x12D1
+
+				if (id->idVendor == HUAWEI_VENDOR_ID) {
+					struct usb_device *dev = interface_to_usbdev (iface);
+					info("sending switch command to huawei cd-rom");
+					usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+							USB_REQ_SET_FEATURE,USB_TYPE_STANDARD |USB_RECIP_DEVICE,0x0001,0,NULL,0,USB_CTRL_SET_TIMEOUT);
+					info("sending switch command done");
+				}
+				return NULL;
+			}
 			return t;
 		}
 	}