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Re: Kernel panic in AppleFWOHCI

I know this may be a little behind, and possibly not very useful, but I would like to mention that when testing our firewire devices, I sometimes also get a kernel panic inside the AppleFWOHCI on Mac OS 10.1.3. I get it on a Powerbook Titanium G4 (550Mhz).

I have seen it quite a few times while running our cameras from the internal FireWire port. I can't seem to reproduce it on any regular basis though and have yet to see it while testing on my PowerMac 733 Mhz G4.

If/when I see it again, I will get as much information as I can.
Thanks,
Jon


On Tuesday, March 26, 2002, at 02:48 AM, Bernd Lvhr wrote:

Hi,

when a Powerbook Titanium wakes up with my PC-Card, 4 out of 5 times the kernel panics inside AppleFWOHCI (Mac OS 10.1.3).
Here is some info from the screen:

Unresolved kernel trap (cpu 0): 0x200 - Machine check DAR=0x113d2000 PC=0x1bca998c
Exception state (sv=0x1b9e9000)
Backtrace:
...
Kernel loadable modules in backtrace:
com.apple.driver. AppleFWOHCI(1.1.2d24)@0x1bca4000
Kernel loadables module depen...
...

Darwin Kernel Version 5.3
Memory access exception (1,0,0)

Peeking with gdb shows the crash happens at IOWorkLoop::checkForWork, but the addresses involved do not have anything to do with my driver. Actually my driver has just downloaded its firmware (it is a RAM based comm device) and is ready for service. I do essentially the same sleep/wake procedure as in my USB driver, which works fine.

I do not see the relation between my kext waking up and the FireWire driver, but the panic only occurs when my kext has been loaded.

Any help, hints or tips are appreciated!

Thanks

Bernd
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References: 
 >Kernel panic in AppleFWOHCI (From: Bernd Löhr <email@hidden>)



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