AHCI - Fix CAM reentrancy problem, work-around HW async notification issue.
* Our XPT_ENG_EXEC was not running asynchronously like we thought, nor
was CAM_SCAN_BUS. Use the not xpt_action_async() CAM call to ensure
these run asynchrnously.
* The SDBS interrupt bit does not always get set when an async notification
is receives. It is unclear whether this is because the port multipler (PM)
is sending a device set bits with 'N' but not 'I' flagged, or whether it
is a bug in the host controller. It only occurs while the AHCI port is
under load.
nant's projects / dragonfly.git / commit