Rework buffer position reporting code.

- use simpler data structures (makes the code shorter).

- if multiple interrupts are missed, call audio(4) as many times as we
  missed interrupts (unless the pointer wrapped, which this is
  undetectable, but upper layer handles it)

- fetch the link fifos size in the interrupt handler, as, according to
  the spec it may change dynamically.

- certain devices expose the last offset of the link fifo size instead
  of the fifo size itself; workaround this by incrementing the
  reported link fifo size if it's odd. Fixes recovery after missed
  interrupts on asus eeepcs, maybe others.

ok deraadt, help from armani@

0 files changed, 0 insertions, 0 deletions