Re: 2.3.47-pre6 panics aic7xxx near pci_map_single() (direction =PCI_DMA_NONE)

From: Horst von Brand (vonbrand@sleipnir.valparaiso.cl)
Date: Sun Feb 20 2000 - 20:26:00 EST

Tigran Aivazian <tigran@aivazian.fsnet.co.uk> said:
> "David S. Miller" wrote:
> > Please try this patch:

> Tried and it still does not work. I.e. it boots but at the attempt to
> mount a SCSI cdrom it hangs - I can't even press Alt-SySrq-P.

Note I've been having exactly the same trouble with IDE CD and 2.3.46. It
seems to be due to PIIX tuning or IDE auto DMA. Drive works fine with 2.2.x
(up to 2.2.15pre9). i686 UP, Red Hat 6.1 + binutils-2.9.5.0.27; various
compilers tried (egcs-1.1.2-24 (RH), gcc-2.95.2, late egcs snapshots)

Things to try (Thanks to Jens Axboe):

- Just read a block off the drive (so you rule out the filesystem) [Hangs
  here]
- Get it to play an audio CD (check commands work, no data transfer) [Works
  for me] 

-- 
Horst von Brand                             vonbrand@sleipnir.valparaiso.cl
Casilla 9G, Viņa del Mar, Chile                               +56 32 672616

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