fix PCI code, use pci_find_device()
+pci_enable_device() needs to be added to many drivers
+
standardize error codes
get rid of spurious "char-major-98-0 not found"
-different error code for board error vs buffer overflow
-
spinlocks
autoloading causes BUG on failure.
Comedi should support devfs
-ni_pcimio issues:
-
-- ao dma
-
-- ai doesn't stop with DMA
+ni_pcimio: doesn't do DMA with AO
-- COMEDI_WAKE_EOS doesn't work with DMA
+ni_pcimio: ai COMEDI_WAKE_EOS doesn't work with DMA
-- ao "write: Invalid argument" for initial write
+ni_pcimio: ao "write: Invalid argument" for initial write