CVS commit: [netbsd-3] src/sys/dev/ata

[Matthias Scheler <tron%netbsd.org@localhost>]

Module Name:    src
Committed By:   tron
Date:           Wed Jul  6 22:03:02 UTC 2005

Modified Files:
        src/sys/dev/ata [netbsd-3]: ata_wdc.c

Log Message:
Pull up revision 1.82 (requested by thorpej in ticket #553):
- 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 -r1.79 -r1.79.2.1 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.