Comment 9 for bug 90902

I suffer from the same problem.
My hw is a Version 1000 F5D7050 Bekin usb adapter.
The device does work using the edgy and islsm from git (after extracting the fiwmare with fwextract from the windows .sys file using
 ./fwextract PRISMAXP.SYS isl3886 nobyteswap
and then sudo cp isl388600.arm /lib/firmware/$(uname -r)/isl3890usb

The problem is not yet resolved (tried latest mwu and linville branches from git) upstream.

islsm_usb does not compile on feisty due to the use of mac80211 as the network stack (I guess).

The problem at /usr/src/linux/ubuntu/wireless/p54/prism54usb.c:351

        err = usb_bulk_msg(priv->udev,
                           usb_rcvbulkpipe(priv->udev, P54U_PIPE_DATA),
                           buf, 0x2020, &alen, 1000);

is that alen is left 0. The islsm drivers *works* in a completely different way.