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[Qemu-devel] [BUG] USB assertion triggers in usb_packet_complete()
From: |
Thomas Huth |
Subject: |
[Qemu-devel] [BUG] USB assertion triggers in usb_packet_complete() |
Date: |
Mon, 10 Oct 2011 15:03:41 +0200 |
Hi!
I am currently facing a problem when running QEMU (up-to-date git
version) with OHCI and a lot of virtual USB devices.
The emulator dies with the following assertion:
qemu-system-arm: hw/usb.c:337: usb_packet_complete:
Assertion `p->owner != ((void *)0)' failed.
To reproduce this problem, you can run the configure script with
"--target-list=arm-softmmu" for example, then download the files
vmlinuz-2.6.26-2-versatile and initrd.img-2.6.26-2-versatile
from http://people.debian.org/~aurel32/qemu/arm/ and then run
qemu like this:
qemu-system-arm -kernel vmlinuz-2.6.26-2-versatile \
-initrd initrd.img-2.6.26-2-versatile -M versatilepb -usb \
-drive if=none,file=/tmp/linux-0.2.img,cache=none,id=disk0 \
-device usb-storage,drive=disk0 -usbdevice mouse \
-usbdevice keyboard -usbdevice tablet
It boots the Linux kernel for a while, then dies with the above
assertion.
Observations:
- It could be related to the fact that QEMU puts a hub into the
USB tree in that case ... when I specify less USB devices, I was
not able to reproduce this problem, but in that case there are
also no hubs in the tree. According to the comment in
usb_packet_complete(), there might be problems with the assert() in
case there is a hub ... ?
- So far I was only able to reproduce this problem when the emulated
platform uses an OHCI controller. I haven't seen the problem to
occur with UHCI yet (but I have to admit that I also haven't done a
lot of tests with UHCI).
Do you have any ideas what could be wrong here?
Regards,
Thomas
- [Qemu-devel] [BUG] USB assertion triggers in usb_packet_complete(),
Thomas Huth <=