still CMD646 IDE problem in kernel-2.4.0-test3

[Michel Lanners]

Hi all,

On   4 Jul, this message from Kaoru Fukui echoed through cyberspace:
> I have the problem in kernel-2.4.0-test3.
> My machine is BWG3Version2.
> it has fast ide drive which is CDD646.
> It doesnot work still on develop kernel.

I'm having similar problems with my Promise U/66 IDE card. Panics the
same way right when accessing the partitions.

> Partition check:
>  hda:Machine check in kernel mode.
> Caused by (from SRR1=41030): Transfer erre ack signal
> NIP: C00D5AF4 XER: 00000000 LR:C00D5A94 REGS: c022fd60 TRAP: 0200
       ^^^^^^^^                  ^^^^^^^^
Could you have a look at your System.map and tell us in what function
these adresses are? For me it panics in the interrupt handler.

> MSR: 00041030 EE: 0 PR: 0 FP: 0 ME: 1 IR/DR: 11
> TASK = c022e030[0] 'swapper' Last syscall: 120
> last math 00000000 last altivec 00000000
> GPR00: 000000FF C022FE10 C022E030 00000000 00001032 00000000 00000000 00000000
> GPR08: C02DB1AC FE000000 FE000000 C0250000 00000001 003030AC 00000000 00000000
> GPR16: 00000000 C02B0000 C02B0000 C02C0000 C0230000 C02BA694 C02BA690 C00050EB
> GPR24: C0006644 C022D3E0 C022D3E0 C022D3E0 C02DB1AC C03E5260 C00E0CC4 C02DB214

Are you sure this is the complete panic message? There should be a few
more lines after this one, with a backtrace and a few more details on
what happened...

What I hate the most about this panic is that it should indicate a
hardware problem, according to the PPC docs. 'Transfer error ack' should
be raised by the memory controller on parity errors and the such. I
wonder how this signal is actually wired in macs.....

Michel

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