You are most likely correct, but you are the first report.
Cheers,
On Fri, 5 May 2000, Arnd Bergmann wrote:
> I noticed that configuring the kernel with "VIA82CXXX Tuning support (WIP)"
> and "Use PCI DMA by default when available" makes my cdrom drive on hdd
> inaccessible when using "splitfifo=1".
>
> for example, what happen is:
>
> # mount /dev/sr1 /mnt/cdrom -t iso9660
> sr1: CDROM (ioctl) reports ILLEGAL REQUEST.
> isofs_read_super: bread failed, dev=0b:01, iso_blknum=16, block=16
> mount: wrong fs type, bad option, bad superblock on /dev/sr1,
> or too many mounted file systems
>
> I have a via MVP3 (82586B) board with an Ultra ATA capable hard drivee
> as hda and an atapi cdrom drive hdd. The problem exists with both
> ide-cd and ide-scsi, while disabling any of VIA82CXXX_TUNING,
> BLK_DEV_IDEDMA_PCI or splitfifo solves the problem.
>
> I guess config_drive_xfer_rate() in drivers/ide/via82cxxx.c should
> be checking the fifo configurations before setting a DMA mode.
>
> Arnd <><
>
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>
Andre Hedrick
The Linux ATA/IDE guy
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