[PATCH] usb: ehci in 2.4 with async_unlink

[PATCH] usb: ehci in 2.4 with async_unlink

This is a long-standing problem. I had people hitting it from time to time,
but they would always go under instead of testing and reporting. Now one
gentleman reports stepping on this bug under simpler to reproduce conditions
than before. In his case, I/O stops when two DVD drives are connected
to the same bus.

I would like this to be in a test release after 2.4.32.

-- Pete