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Is Mac OS X bug about USB device


Hi all:

Now I make a driver for AR5523. It is a USB 11g chip.
But it will crash the system when send message via message bulk out pipe.
only opcode is 4 will cause crash. other is not.
I cannot understand the opcode is recognize only by device.
How the USB device cause system crash?

I try it on 10.2.8 & 10.3.9, the result is same.
here is the panic log

Sun May  8 17:53:33 2005




Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x0000000000000000 PC=0x00000000237089F0
Latest crash info for cpu 0:
   Exception state (sv=0x22E45280)
      PC=0x237089F0; MSR=0x00009030; DAR=0x00000000; DSISR=0x40000000; LR=0x237089E8; R1=0x0D0EBB10; XCP=0x0000000C (0x300 - Data access)
      Backtrace:
         0x237089E8 0x237086E0 0x00255FD4 0x00254838 0x00254A58 0x008A4724 0x008A5A34 0x008A5D64
         0x008A5B78 0x00035148 0x00035028
      Kernel loadable modules in backtrace (with dependencies):
         com.ath.driver.AR5005USB_Wlan(1.0.0d1)@0x23706000
            dependency: com.apple.iokit.IOPCIFamily(1.4)@0x398000
            dependency: com.apple.iokit.IOUSBFamily(2.1.5)@0x883000
            dependency: com.apple.iokit.IONetworkingFamily(1.4.0)@0x3da000
         com.apple.driver.AppleUSBHub(2.1.5)@0x89f000
            dependency: com.apple.iokit.IOUSBFamily(2.1.5)@0x883000
Proceeding back via exception chain:
   Exception state (sv=0x22E45280)
      previously dumped as "Latest" state. skipping...
   Exception state (sv=0x230F2000)
      PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

Kernel version:
Darwin Kernel Version 7.9.0:
Wed Mar 30 20:11:17 PST 2005; root:xnu/xnu-517.12.7.obj~1/RELEASE_PPC


panic(cpu 0): 0x300 - Data access
Latest stack backtrace for cpu 0:
      Backtrace:
         0x00083498 0x0008397C 0x0001EDA4 0x00090C38 0x0009402C
Proceeding back via exception chain:
   Exception state (sv=0x22E45280)
      PC=0x237089F0; MSR=0x00009030; DAR=0x00000000; DSISR=0x40000000; LR=0x237089E8; R1=0x0D0EBB10; XCP=0x0000000C (0x300 - Data access)
      Backtrace:
         0x237089E8 0x237086E0 0x00255FD4 0x00254838 0x00254A58 0x008A4724 0x008A5A34 0x008A5D64
         0x008A5B78 0x00035148 0x00035028
      Kernel loadable modules in backtrace (with dependencies):
         com.ath.driver.AR5005USB_Wlan(1.0.0d1)@0x23706000
            dependency: com.apple.iokit.IOPCIFamily(1.4)@0x398000
            dependency: com.apple.iokit.IOUSBFamily(2.1.5)@0x883000
            dependency: com.apple.iokit.IONetworkingFamily(1.4.0)@0x3da000
         com.apple.driver.AppleUSBHub(2.1.5)@0x89f000
            dependency: com.apple.iokit.IOUSBFamily(2.1.5)@0x883000
   Exception state (sv=0x230F2000)
      P
*********
Best Regards
Heyu
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