Re: Kernel panic in AppleFWOHCI

• Subject: Re: Kernel panic in AppleFWOHCI
• From: "Alfonso Guerra" <email@hidden>
• Date: Thu, 28 Mar 2002 22:10:22 -0800

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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