Messages in this thread | | | Date | Sat, 22 May 2010 12:26:15 +0200 | From | Stefan Richter <> | Subject | DMAR:[fault reason 02] Present bit in context entry is clear (firewire-ohci) |
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Hi,
I came across a report of the subject message. What does it mean; what type of bug should be look for?
https://bugzilla.redhat.com/show_bug.cgi?id=587178 >>> firewire_ohci 0000:04:00.4: PCI INT C -> GSI 16 (level, low) -> IRQ 16 firewire_ohci 0000:04:00.4: setting latency timer to 64 firewire_ohci: Added fw-ohci device 0000:04:00.4, OHCI version 1.0 DRHD: handling fault status reg 2 DMAR:[DMA Read] Request device [04:00.0] fault addr fffff000 DMAR:[fault reason 02] Present bit in context entry is clear DMAR:[DMA Read] Request device [04:00.0] fault addr fffff000 DMAR:[fault reason 02] Present bit in context entry is clear DMAR:[DMA Read] Request device [04:00.0] fault addr fffff000 DMAR:[fault reason 02] Present bit in context entry is clear <<<
The log sounds as if this happens during from-device DMA of 04:00.4 into a consistent buffer, yet the fault is logged for device 04:00.0. The log is from a Dell M4500. The devices are, according to a web search, 04:00.0 CardBus bridge [0607]: Ricoh Co Ltd Device [1180:e476] (rev 02) 04:00.4 FireWire (IEEE 1394) [0c00]: Ricoh Co Ltd Device [1180:e832] (rev 03) (prog-if 10)
Thanks for any hint, -- Stefan Richter -=====-==-=- -=-= =-==- http://arcgraph.de/sr/
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