RT3090: NULL pointer dereference causes WIFI to stop working

Steps to reproduce:

- Right click network manager and unlink 'Enable Networking'

This causes

Dec 11 18:33:43 whiteowl kernel: [ 2805.625265] BUG: unable to handle kernel NULL pointer dereference at (null)
Dec 11 18:33:43 whiteowl kernel: [ 2805.625282] IP: [<f85e7f3e>] rt2x00queue_init_queues+0x4e/0xa0 [rt2x00lib]

and network fails to re-enable and computer fails to shutdown cleaning amongst others.

WIFI card is:

01:00.0 Network controller: RaLink RT3090 Wireless 802.11n 1T/1R PCIe

Possibly related to

https://bugzilla.redhat.com/show_bug.cgi?id=642031

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-23-generic 2.6.35-23.41
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-23.41-generic 2.6.35.7
Uname: Linux 2.6.35-23-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: adam 1769 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfeb00000 irq 45'
   Mixer name : 'Realtek ALC662 rev1'
   Components : 'HDA:10ec0662,14621031,00100101'
   Controls : 14
   Simple ctrls : 9
Date: Sat Dec 11 18:42:57 2010
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=3ff4d5cd-97f4-4805-81fc-755820134fbd
InstallationMedia: Ubuntu-Netbook 10.10 "Maverick Meerkat" - Alpha i386 (20100803.1)
Lsusb:
 Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: MICRO-STAR INTERNATIONAL CO., LTD MS-N014
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-23-generic root=UUID=201a6a3a-fed0-47c5-8e00-a5e7c5fced92 ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_GB.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
StagingDrivers: rt2860sta
Title: [STAGING]
dmi.bios.date: 11/30/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: EN014IMS.10B
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: MS-N014
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD
dmi.board.version: REV:1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: MS-N014
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrEN014IMS.10B:bd11/30/2009:svnMICRO-STARINTERNATIONALCO.,LTD:pnMS-N014:pvrREV1.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rnMS-N014:rvrREV1.0:cvnMS-N014:ct10:cvrN/A:
dmi.product.name: MS-N014
dmi.product.version: REV:1.0
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO., LTD