Peter Grehan a384947e92 Fix panic and breakage for non-DMA ATA devices e.g. powermac macio cells.
Handle cases where dma function pointers may be NULL, and where
the max_iosize can't be derived from a DMA data structure. For
the latter, revert to the prior behaviour of using DFLTPHYS for
the max i/o size when there is no other data.

Reviewed by:		marcel
No objection by:	sos
2008-05-08 17:55:44 +00:00
..
2008-05-06 22:41:23 +00:00
2008-05-06 17:45:54 +00:00
2008-01-15 18:34:47 +00:00
2008-02-23 22:40:05 +00:00