$OpenBSD: patch-backend_usb-libusb_c,v 1.2 2012/05/18 16:31:22 ajacoutot Exp $

http://www.cups.org/str.php?L4088

--- backend/usb-libusb.c.orig	Sun Feb 12 09:35:28 2012
+++ backend/usb-libusb.c	Fri May 18 18:17:38 2012
@@ -1148,9 +1148,14 @@ open_device(usb_printer_t *printer,	/* I - Printer */
   else
   {
     printer->usblp_attached = 0;
-    fprintf(stderr, "DEBUG: Failed to check whether %04x:%04x has the \"usblp\" kernel module attached\n",
-	      devdesc.idVendor, devdesc.idProduct);
-    goto error;
+
+    if (errcode != LIBUSB_ERROR_NOT_SUPPORTED)
+    {
+      fprintf(stderr,
+              "DEBUG: Failed to check whether %04x:%04x has the \"usblp\" "
+              "kernel module attached\n", devdesc.idVendor, devdesc.idProduct);
+      goto error;
+    }
   }
 
  /*
