613ea3ba08
The existing cleanup code was based on the Atheros reference driver from way back and stuff that was in Linux ath9k. It turned out to be .. rather silly. Specifically: * The whole method of determining whether there's hardware-queued frames was fragile and the BAW would never quite work right afterwards. * The cleanup path wouldn't correctly pull apart aggregate frames in the queue, so frames would not be freed and the BAW wouldn't be correctly updated. So to implement this: * Pull the aggregate frames apart correctly and handle each separately; * Make the atid->incomp counter just track the number of hardware queued frames rather than try to figure it out from the BAW; * Modify the aggregate completion path to handle it as a single frame (atid->incomp tracks the one frame now, not the subframes) and remove the frames from the BAW before completing them as normal frames; * Make sure bf->bf_next is NULled out correctly; * Make both aggregate session and non-aggregate path frames now be handled via the incompletion path. TODO: * kill atid->incomp; the driver tracks the hardware queued frames for each TID and so we can just use that. This is a stability fix that should be merged back to stable/10. Tested: * AR5416, STA MFC after: 7 days
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