Tony Tye
d16c392338
The intercept queue submit needs to be obstruction free as it can be invoked by the runtime async handler helper thread. The code had a busy wait loop waiting for a free slot to be available to add the retry barrier packet. Blocking that thread prevents it servicing other async handlers which may need to execute in order to allow packets on the hardware queue to be processed to free up a slot. Change the code to always leave one free slot unless there is a retry barrier packet already on the queue. Change-Id: If901c865550258b790b995d58037b0f99f1968cc