From c0a5eb81b43e56569cfdb9c86fd78930b2765b96 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Wed, 28 Aug 2013 11:39:02 +0200
Subject: [PATCH] xhci: fix endpoint interval calculation

Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit ca7162782a293f525633e5816470498dd86a51cf)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 hw/usb/hcd-xhci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/usb/hcd-xhci.c b/hw/usb/hcd-xhci.c
index 58c88b8..3c0ba8e 100644
--- a/hw/usb/hcd-xhci.c
+++ b/hw/usb/hcd-xhci.c
@@ -1257,7 +1257,7 @@ static void xhci_init_epctx(XHCIEPContext *epctx,
         epctx->ring.ccs = ctx[2] & 1;
     }
 
-    epctx->interval = 1 << (ctx[0] >> 16) & 0xff;
+    epctx->interval = 1 << ((ctx[0] >> 16) & 0xff);
 }
 
 static TRBCCode xhci_enable_ep(XHCIState *xhci, unsigned int slotid,