[PATCH] UHCI: Reimplement FSBR

This patch (as683) re-implements Full-Speed Bandwidth Reclamation (FSBR)
properly.  It keeps track of which endpoint queues have advanced, and
when none have advanced for a sufficiently long time, FSBR is turned
off.  The next TD on each of the non-moving queues is modified to
generate an interrupt on completion, so that FSBR can be re-enabled as
soon as the hardware starts to make some progress.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/host/uhci-debug.c

@@ -274,7 +274,8 @@ static int uhci_show_root_hub_state(struct uhci_hcd *uhci, char *buf, int len)
 	    default:
 		rh_state = "?";			break;
 	}
-	out += sprintf(out, "Root-hub state: %s\n", rh_state);
+	out += sprintf(out, "Root-hub state: %s   FSBR: %d\n",
+			rh_state, uhci->fsbr_is_on);
 	return out - buf;
 }