36 lines
1.1 KiB
Diff
36 lines
1.1 KiB
Diff
From 959f57d34f11daf0da6f73541243934f39dfb2b2 Mon Sep 17 00:00:00 2001
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From: Hans de Goede <hdegoede@redhat.com>
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Date: Fri, 13 Jan 2012 14:26:26 +0100
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Subject: [PATCH 119/140] usb-ehci: Clear the portstatus powner bit on device
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disconnect
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According to the EHCI spec port ownerhsip should revert to the EHCI controller
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on device disconnect. This fixes the problem of a port getting stuck on USB 1
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when using redirection and plugging in a USB 2 device after a USB 1 device
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has been redirected.
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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hw/usb-ehci.c | 5 +++++
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1 file changed, 5 insertions(+)
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diff --git a/hw/usb-ehci.c b/hw/usb-ehci.c
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index a946e1d..69bcc4b 100644
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--- a/hw/usb-ehci.c
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+++ b/hw/usb-ehci.c
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@@ -764,6 +764,11 @@ static void ehci_detach(USBPort *port)
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USBPort *companion = s->companion_ports[port->index];
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companion->ops->detach(companion);
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companion->dev = NULL;
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+ /*
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+ * EHCI spec 4.2.2: "When a disconnect occurs... On the event,
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+ * the port ownership is returned immediately to the EHCI controller."
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+ */
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+ *portsc &= ~PORTSC_POWNER;
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return;
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}
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--
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1.7.9.3
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