From 959f57d34f11daf0da6f73541243934f39dfb2b2 Mon Sep 17 00:00:00 2001

From: Hans de Goede <hdegoede@redhat.com>

Date: Fri, 13 Jan 2012 14:26:26 +0100

Subject: [PATCH 119/140] usb-ehci: Clear the portstatus powner bit on device

 disconnect

According to the EHCI spec port ownerhsip should revert to the EHCI controller

on device disconnect. This fixes the problem of a port getting stuck on USB 1

when using redirection and plugging in a USB 2 device after a USB 1 device

has been redirected.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>

---

 hw/usb-ehci.c |    5 +++++

 1 file changed, 5 insertions(+)

diff --git a/hw/usb-ehci.c b/hw/usb-ehci.c

index a946e1d..69bcc4b 100644

--- a/hw/usb-ehci.c

+++ b/hw/usb-ehci.c

@@ -764,6 +764,11 @@ static void ehci_detach(USBPort *port)

         USBPort *companion = s->companion_ports[port->index];

         companion->ops->detach(companion);

         companion->dev = NULL;

+        /*

+         * EHCI spec 4.2.2: "When a disconnect occurs... On the event,

+         * the port ownership is returned immediately to the EHCI controller."

+         */

+        *portsc &= ~PORTSC_POWNER;

         return;

     }

-- 

1.7.9.3