From 38f3ad5e7463d4dd490a8081a5f3f9f2dec7ecd6 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <felipe.balbi@nokia.com>
Date: Thu, 12 Jun 2008 10:49:47 +0300
Subject: usb: hub: add check for unsupported bus topology

We can't allow hubs on the 7th tier as they would allow
devices on the 8th tier.

Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 drivers/usb/core/hcd.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'drivers/usb/core/hcd.h')

diff --git a/drivers/usb/core/hcd.h b/drivers/usb/core/hcd.h
index 50b8bb2d121..5b0b59b0d89 100644
--- a/drivers/usb/core/hcd.h
+++ b/drivers/usb/core/hcd.h
@@ -21,6 +21,8 @@
 
 #include <linux/rwsem.h>
 
+#define MAX_TOPO_LEVEL		6
+
 /* This file contains declarations of usbcore internals that are mostly
  * used or exposed by Host Controller Drivers.
  */
-- 
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