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From: Gerd Hoffmann <kraxel@redhat.com>
Date: Thu, 02 Feb 2017 08:11:50 +0100
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Subject: Re: [Qemu-devel] usb3 - xhci - Assertion `intr->er_full' failed
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To: Martin Cerveny <M.Cerveny@computer.org>
Cc: qemu-devel@nongnu.org

  Hi,
> - usb with usbredir 0.7.1

What kind of device do you assign to the guest?

> - guest windows 7 - renesas driver 2.1.36 or 2.1.39

ok.

> Where is the verfied windows driver that is compatible/tested with xhci c=
ode ?

Usually I test with the drivers shipped by the operating system, i.e.
linux kernel or windows 8 (or newer).

> I see some movement on xhci sources (https://www.kraxel.org/cgit/qemu/log=
/?h=3Dwork/qemu-xhci) -=20
> Is there some special driver for "PCI_DEVICE_ID_REDHAT_XHCI" "1b36:000c P=
CI xhci usb host adapter" for Windows Guests
> that is compatible with xhci qemu code ?

Generic xhci drivers should work with any xhci controller, no matter
what pci ids it has.

> ---------------------------------- USB keyboard + qemu-xen-4.8.0 + 2.1.39=
 driver + DEBUG_XHCI + DEBUG_DATA ---------------------------

Is the usb keyboard enough to trigger this?

enabling usb_xhci_* trace events would be more helpful than DEBUG_XHCI
(see qemu.git/docs/tracing.txt).

cheers,
  Gerd