aic7xxx.c:

aic7xxx.c:
	Style nits.

	Make sure that our selection hardware is disabled
	as soon as possible after detecting a busfree and
	even go so far as to disable the selection hardware
	in advance of an event that will cause a busfree
	(ABORT or BUS DEVICE RESET message).  The concern
	is that the selection hardware will select a target
	for which, after processing the bus free, there
	will be no commands pending.  The sequencer idle
	loop will re-enable the selection should it still be
	necessary.

	In ahc_handle_scsiint(), clear SSTAT0 events several
	PCI transactions (most notably reads) prior to clearing
	SCSIINT.  The newer chips seem to take a bit of time to
	see the change which can make the clearing of SCSIINT
	ineffective.

	Don't bother panicing at the end of ahc_handle_scsiint().
	Getting to the final else just means we lost the race
	with clearing SCSIINT.

	In ahc_free(), handle init-level 0.  This can happen when we
	fail the attach for RAID devices.  While I'm here, also kill
	the parent dma tag.

	In ahc_match_scb(), consider initiator ccbs to be any
	that are not from the target mode group.  This fixes
	a bug where an external target reset CCB was not getting
	cleaned up by the reset code.

	Don't bother freezing a ccb in any of our "abort" routines
	when the status is set to CAM_REQ_CMP.  This can happen
	for a target reset ccb.

aic7xxx.reg:
	Reserve space for a completion queue.  This will be used
	to enhance performance in the near future.

aic7xxx.seq:
	Remove an optimization for the 7890 autoflush bug that
	turned out to allow, in rare cases, some data to get
	lost.

	Implement a simpler, faster, fix for the PCI_2_1 retry
	bug that hangs the sequencer on an SCB dma for certain chips.

	Test against SAVED_SCSIID rather than SELID during target
	reselections.  This is how we always did it in the past,
	but the code was modified while trying to work around an
	issue with the 7895.  SAVED_SCSIID takes into account
	twin channel adapters such as the 2742T, whereas SELID
	does not have the channel bit.  This caused invalid
	selection warnings and other strangeness on these cards.

aic7xxx_pci.c
	Use the correct mask for checking the generic aic7892
	entry.