[theamk]

I second others: it is horrible, low quality code.

I spent lots of time looking at released drivers for things like wifi dongles and cheap Linux sticks/tablets, and there are all sorts of horrors. The wifi cards do not fully implement scanning or ad-hoc mode. Existing ioctls are ignored or implemented wrong. Sleep is used for thread synchronization. Android device drivers hardcode specific app names and apply fixups for them, presumably to prevent crashes.

Intel has much better code, at least in wireless drivers, but to be fair their jobs is easier, because most of the logic runs in the embedded processor, and you only get the binary blob for its code.