Index: uvisor.c
===================================================================
RCS file: /cvs/src/sys/dev/usb/uvisor.c,v
retrieving revision 1.27
diff -u -p -r1.27 uvisor.c
--- uvisor.c	23 Jun 2006 06:27:12 -0000	1.27
+++ uvisor.c	22 Nov 2006 12:23:11 -0000
@@ -140,6 +140,7 @@ struct uvisor_softc {
  * added sc_vendor for later interrogation in failed initialisations
  */
 	int			sc_vendor;	/* USB device vendor */
+	int			sc_product;	/* USB device product */
 
 	device_ptr_t		sc_subdevs[UVISOR_MAX_CONN];
 	int			sc_numcon;
@@ -256,6 +257,7 @@ USB_ATTACH(uvisor)
 
 	sc->sc_flags = uvisor_lookup(uaa->vendor, uaa->product)->uv_flags;
 	sc->sc_vendor = uaa->vendor;
+	sc->sc_product = uaa->product;
 	
 	if ((sc->sc_flags & (VISOR | PALM4)) == 0) {
 		printf("%s: device is neither visor nor palm\n", 
@@ -463,18 +465,21 @@ uvisor_init(struct uvisor_softc *sc, str
 	
 	if (sc->sc_flags & NOFRE)
 		return (err);
-	
-	DPRINTF(("uvisor_init: getting available bytes\n"));
-	req.bmRequestType = UT_READ_VENDOR_ENDPOINT;
-	req.bRequest = UVISOR_REQUEST_BYTES_AVAILABLE;
-	USETW(req.wValue, 0);
-	USETW(req.wIndex, 5);
-	USETW(req.wLength, sizeof avail);
-	err = usbd_do_request(sc->sc_udev, &req, &avail);
-	if (err)
-		return (err);
-	DPRINTF(("uvisor_init: avail=%d\n", UGETW(avail)));
-	DPRINTF(("uvisor_init: done\n"));
+
+	if (sc->sc_product != USB_PRODUCT_PALM_ZIRE_31) {
+		DPRINTF(("uvisor_init: getting available bytes\n"));
+		req.bmRequestType = UT_READ_VENDOR_ENDPOINT;
+		req.bRequest = UVISOR_REQUEST_BYTES_AVAILABLE;
+		USETW(req.wValue, 0);
+		USETW(req.wIndex, 5);
+		USETW(req.wLength, sizeof avail);
+		err = usbd_do_request(sc->sc_udev, &req, &avail);
+		if (err)
+			return (err);
+		DPRINTF(("uvisor_init: avail=%d\n", UGETW(avail)));
+		DPRINTF(("uvisor_init: done\n"));
+	}
+
 	return (err);
 }