CVSROOT: /cvs
Module name: src
Changes by: d...@cvs.openbsd.org 2013/01/16 19:44:42
Modified files:
sys/dev/ic : mpi.c
Log message:
we dont need to read the interrupt status register to know if we have
any work to do in the interrupt handler, or to clear it. the relevant bits
indicate whether there's work on the doorbell and clear when there isnt.
we need to read the doorbell if there is work to do, so lets just go that
straight away anyway.
get rid of bus_space_barriers in the io path. barriers are for enforcing
ordering. the doorbell reads and writes dont depend on any other register
values so ordering isnt applicable here.
