Re: [2.6.14-rc1/sparc54]: BUG: soft lockup detected on CPU#0!

[David S. Miller]

From: Tomasz Kłoczko <kloczek@xxxxxxxxxxxxxxxxxx>
Date: Sat, 17 Sep 2005 19:49:17 +0200 (CEST)

> Something new.
> I'm just finish rewrite backup procedure from dumping to NFS volume to
> using piped dump|ssh|dd.
> During this happens:
> 
> PSYCHO0: Uncorrectable Error, primary error type[DMA Write]
> PSYCHO0: bytemask[0000] dword_offset[7] UPA_MID[1f] was_block(1)
> PSYCHO0: UE AFAR [000000005c8bc040]
> PSYCHO0: UE Secondary errors [(DMA Write)]
> PSYCHO0: IOMMU Error, type[Protection Error]

A driver unmapped a DMA area while the device is still
accessing it.  If you're still using the cassini card,
it's driver is the most likely suspect.
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