Module Name:	src
Committed By:	bouyer
Date:		Sun Mar  7 14:02:55 UTC 1999

Modified Files:
	src/sys/dev/ata: ata_wdc.c atavar.h
	src/sys/dev/ic: wdc.c wdcreg.h
Log Message:
Keep track of CRC errors in Ultra-DMA mode. If we noticed a CRC error and we
need to downgrade, downgrade to PIO, as it has been shown if we got CRC errors
in Ultra-DMA mode, we will have silent data corruption in multiword DMA mode
(isn't IDE wonderfull ? :).
Set timeout to 1s for "normal" ata I/O, to minimise the effects of missed
interrupts.