diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2015-10-21 09:44:22 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2015-11-03 11:55:51 +0100 |
| commit | cbf82fa01e6fd4ecb234b235b10ffce548154a95 (patch) | |
| tree | 799f103f653f4fd097a9c2fab7017a67c67665bd /hw/usb/hcd-ehci.c | |
| parent | 3d861a01093f8eedfac9889746ccafcfd32039b7 (diff) | |
ehci: clear suspend bit on detach
When a device is detached, clear the suspend bit (PORTSC_SUSPEND)
in the port status register.
The specs are not *that* clear what is supposed to happen in case
a suspended device is unplugged. But the enable bit (PORTSC_PED)
is cleared, and the specs mention setting suspend with enable being
unset is undefined behavior. So clearing them both looks reasonable,
and it actually fixes the reported bug.
https://bugzilla.redhat.com/show_bug.cgi?id=1268879
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Message-id: 1445413462-18004-1-git-send-email-kraxel@redhat.com
Diffstat (limited to 'hw/usb/hcd-ehci.c')
| -rw-r--r-- | hw/usb/hcd-ehci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c index 64a54c6e84..4e2161b5a7 100644 --- a/hw/usb/hcd-ehci.c +++ b/hw/usb/hcd-ehci.c @@ -726,7 +726,7 @@ static void ehci_detach(USBPort *port) ehci_queues_rip_device(s, port->dev, 0); ehci_queues_rip_device(s, port->dev, 1); - *portsc &= ~(PORTSC_CONNECT|PORTSC_PED); + *portsc &= ~(PORTSC_CONNECT|PORTSC_PED|PORTSC_SUSPEND); *portsc |= PORTSC_CSC; ehci_raise_irq(s, USBSTS_PCD); |