Can't rmmod libertas_sdio because I can't stop/kill crda

[Schugy]

To suspend to RAM reliably I usually enter

sudo rmmod -w libertas-sdio libertas sdhci-pci sdhci mmc-block

But now with Kubuntu 12.04 rmmod hangs because of crda which always occupies wlan1 (libertas_sdio).
Even killall -9 crda doesn't help.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: crda 1.1.2-1ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
Date: Mon Apr 30 18:26:55 2012
ExecutablePath: /sbin/crda
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
ProcEnviron:

SourcePackage: crda
UpgradeStatus: Upgraded to precise on 2012-04-28 (2 days ago)