CVS commit: [netbsd-2] src/sys/dev/ata

[Jeff Rizzo <riz%netbsd.org@localhost>]

Module Name:    src
Committed By:   riz
Date:           Mon Jul 18 03:57:36 UTC 2005

Modified Files:
        src/sys/dev/ata [netbsd-2]: ata_wdc.c

Log Message:
Pull up revision 1.82 (requested by thorpej in ticket #2072):
- When starting an ATA or ATAPI transfer, handle the case where
(*dma_init)()
returns EINVAL, indicating that DMA cannot be done for this
transfer.
Fall back to PIO in this case.
- Add a geodeide_dma_init() routine that checks to make sure that
transfers
start on a 16 byte boundary, returning EINVAL if not.  Works
around a chip
bug that causes a hard system hang.
Problem reported and patch tested by Erik Fair.


To generate a diff of this commit:
cvs rdiff -r1.53.2.3.2.3 -r1.53.2.3.2.4 src/sys/dev/ata/ata_wdc.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.