I am experiencing an oops when trying to bring the interface down.
The kernel is compiled from lates git sources, the driver is rt73usb.
Actually, I was testing the driver in ad-hoc mode, and I was not able to connect. According to the log, the driver senses the MAC of the other computer. The other computer lists rt73usb-based node when scanning for networks. The legacy rt73 driver works fine.
I tried the same test a couple of times a week or two ago, and the results were the same (including the oops.)