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SubjectRe: ohci1394 problem (MMIO broken) (was 2.6.25-rc6-git6: Reported regressions from 2.6.24)
Linus Torvalds schrieb:
> On Tue, 25 Mar 2008, Thomas Meyer wrote:
>
>> and compare lspci -vv from 2.6.25 and 2.6.24:
>>
>> 2.6.25:
>>
>> Region 0: [virtual] Memory at 100000000 (32-bit, non-prefetchable) [size=4K]
>>
>> 2.6.24:
>>
>> Region 0: Memory at 8c000000 (32-bit, non-prefetchable) [size=4K]
>>
>
> Ok, so it didn't use to be at the 4GB mark.
>
> This seems to be a PCI and resource alloc issue. It would be really
> interesting to see where the 4GB allocation started. Ie ignore anything
> else (warnings, driver loadings etc), and _just_ look at lspci -vv output
> for where the memory got allocated.
>
> Did you already bisect that and I just missed it?
>
I didn't bisect this.But I recompiled with CONFIG_RESOURCES_64BIT
*unset* and everything is fine now, i.e. no error occurs anymore.

lspci -vv output:
0c:03.0 FireWire (IEEE 1394): Agere Systems FW323 (rev 61) (prog-if 10
[OHCI])
Subsystem: Agere Systems FW323
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop-
ParErr- Stepping- SERR- FastB2B+ DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 248 (3000ns min, 6000ns max), Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 19
Region 0: Memory at 94406000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [44] Power Management version 2
Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
PME(D0+,D1+,D2+,D3hot+,D3cold-)
Status: D0 PME-Enable- DSel=0 DScale=0 PME+
Kernel driver in use: ohci1394
Kernel modules: firewire-ohci, ohci1394

This is on ingo's git tree (branch: x86-latest) (commit
0fef904c33841be92f5ebdbdb9339dd11a133c92 - x86: ioremap of 64-bit
resource on 32-bit kernel fix)

mfg
thomas


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