unload/reload libertas_sdio causes firmware load failure

[Tim Harvey]

Greetings,

I've noticed that at least for SDIO, unloading and reloading the 
libertas_sdio causes a firmware load failure:

root at phyCORE-iMX31:~/libertas insmod 
./drivers/net/wireless/libertas/libertas.ko
root at phyCORE-iMX31:~/libertas insmod 
./drivers/net/wireless/libertas/libertas_sdio.ko
libertas_sdio: Libertas SDIO driver
libertas_sdio: Copyright Pierre Ossman
HOTPLUG: firmware add /usr/lib/hotplug/firmware/sd8686_helper.bin
HOTPLUG: firmware add /usr/lib/hotplug/firmware/sd8686.bin
libertas: 00:19:70:02:12:3c, fw 8.73.7p3, cap 0x00000303
libertas: PREP_CMD: command 0x00a3 failed: 2
libertas: PREP_CMD: command 0x00a3 failed: 2
libertas: eth1: Marvell WLAN 802.11 adapter
root at phyCORE-iMX31:~/libertas rmmod libertas_sdio
root at phyCORE-iMX31:~/libertas insmod 
./drivers/net/wireless/libertas/libertas_sdio.ko
libertas_sdio: Libertas SDIO driver
libertas_sdio: Copyright Pierre Ossman
HOTPLUG: firmware add /usr/lib/hotplug/firmware/sd8686_helper.bin
libertas: failed to load helper firmware
libertas_sdio: probe of mmc0:0001:1 failed with error -110


My platform is an iMX31 CPU, and a Marvell 8686 using linux 2.6.22 and 
compat-wireless-2008-05-05

Tim