FreeNAS Code

Backport revisions from FreeBSD:

r224531 (mav)

Higher-priority initialization request can eat request scheduling done from
adaclose(). Add immediate_priority check into adaschedule() to restore it.

r224283 (mav)

Do not try to execute FLUSHCACHE on close and print extra messages for
invalidated (considered lost) ada device. Exactly same already done for
the da devices.

Backport r217444 and 217875 from FreeBSD -HEAD.

Some old WD SATA disks report supported and enabled device-initiated
interface power management, but return ABORT error on attempt to disable
it. Make CAM SATA probe sequence ignore this error, as it is not fatal.

Ignore also ATA status errors on DMA Auto-Activation enabling request.
Some HP disks reported to return ABORT error there while declaring support
for this feature.