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SubjectRe: 2.3.47-pre6 panics aic7xxx near pci_map_single() (direction =PCI_DMA_NONE)
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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, Viña del Mar, Chile +56 32 672616

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