From 6d41087491368f8ac8e0616bb27cdd5797b42d1a Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Sat, 25 Apr 2015 12:16:22 -0600
Subject: [PATCH] Fixes some crashes when the hub is removed and/or reinserted

---
 arch/arm/src/lpc17xx/lpc17_usbhost.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/src/lpc17xx/lpc17_usbhost.c b/arch/arm/src/lpc17xx/lpc17_usbhost.c
index 11543bb92e..959b57342a 100644
--- a/arch/arm/src/lpc17xx/lpc17_usbhost.c
+++ b/arch/arm/src/lpc17xx/lpc17_usbhost.c
@@ -3105,7 +3105,7 @@ static int lpc17_cancel(FAR struct usbhost_driver_s *drvr, usbhost_ep_t ep)
     {
       /* We really need some kind of atomic test and set to do this right */
 
-      td              = (struct lpc17_gtd_s *)ed->hw.headp;
+      td              = (struct lpc17_gtd_s *)(ed->hw.headp & ED_HEADP_ADDR_MASK);
       ed->hw.headp    = LPC17_TDTAIL_ADDR;
       ed->asynch      = NULL;