From c09a4634d945df5d7e1fbc394646e78d7d713c67 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Tue, 27 Aug 2013 17:00:04 +0200
Subject: [PATCH] Revert "usb-hub: report status changes only once"

This reverts commit a309ee6e0a256f690760abfba44fceaa52a7c2f3.

This isn't in line with the usb specification and adds regressions,
win7 fails to drive the usb hub for example.

Was added because it "solved" the issue of hubs interacting badly
with the xhci host controller.  Now with the root cause being fixed
in xhci (commit <FIXME>) we can revert this one.

Cc: qemu-stable@nongnu.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
(cherry picked from commit bdebd6ee81f4d849aa8541c289203e3992450db0)

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 hw/usb/dev-hub.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/hw/usb/dev-hub.c b/hw/usb/dev-hub.c
index e865a98..4188a3c 100644
--- a/hw/usb/dev-hub.c
+++ b/hw/usb/dev-hub.c
@@ -33,7 +33,6 @@ typedef struct USBHubPort {
     USBPort port;
     uint16_t wPortStatus;
     uint16_t wPortChange;
-    uint16_t wPortChange_reported;
 } USBHubPort;
 
 typedef struct USBHubState {
@@ -468,11 +467,8 @@ static void usb_hub_handle_data(USBDevice *dev, USBPacket *p)
             status = 0;
             for(i = 0; i < NUM_PORTS; i++) {
                 port = &s->ports[i];
-                if (port->wPortChange &&
-                    port->wPortChange_reported != port->wPortChange) {
+                if (port->wPortChange)
                     status |= (1 << (i + 1));
-                }
-                port->wPortChange_reported = port->wPortChange;
             }
             if (status != 0) {
                 for(i = 0; i < n; i++) {