QuadEthernet driver `sunqe' broken

[ludo@chbouib.org (Ludovic Courtès)]

Hi,

(Note: I tried posting this message to `sparclinux' but Bogofilter at
vger.kernel.org is so zealous that all my attempts failed!)

The `sunqe' driver in `linux-image-2.6.18-4-sparc32' is broken.  I.e.,
it loads fine, but then reports the following erroneous ethernet
addresses:

  sunqe.c:v4.0 June 23, 2006 David S. Miller (davem@davemloft.net)
  eth0: qe channel[0] 00:00:00:00:00:00 
  eth1: qe channel[1] 00:00:00:00:00:00 
  eth2: qe channel[2] 00:00:00:00:00:00 
  eth3: qe channel[3] 00:00:00:00:00:00

Also, `rmmod sunqe' yields the following oops:

  [f001b3b0 : of_device_remove+0x2c/0x34 ]
  [f0116f70 : __device_release_driver+0x78/0x8c ]
  [f0117308 : driver_detach+0x90/0x274 ]
  [f01164c0 : bus_remove_driver+0x7c/0xa0 ]
  [f0117524 : driver_unregister+0x10/0x1c ]
  [fe650504 : qec_exit+0x10/0x5c [sunqe] ]
  [f004cd44 : sys_delete_module+0x1cc/0x1f4 ]
  [f0011634 : syscall_is_too_hard+0x3c/0x40 ]
  [00011220 : 0x11228 ] 

  [f013a82c : unregister_netdevice+0x184/0x248 ]
  [fe64f058 : qec_sbus_remove+0x18/0x70 [sunqe] ]
  [f001b3b0 : of_device_remove+0x2c/0x34 ]
  [f0116f70 : __device_release_driver+0x78/0x8c ]
  [f0117308 : driver_detach+0x90/0x274 ]
  [f01164c0 : bus_remove_driver+0x7c/0xa0 ]
  [f0117524 : driver_unregister+0x10/0x1c ]
  [fe650504 : qec_exit+0x10/0x5c [sunqe] ]
  [f004cd44 : sys_delete_module+0x1cc/0x1f4 ]
  [f0011634 : syscall_is_too_hard+0x3c/0x40 ]
  [00011220 : 0x11228 ] 

  [f003d9d0 : notifier_call_chain+0x1c/0x4c ]
  [f013a82c : unregister_netdevice+0x184/0x248 ]
  [fe64f058 : qec_sbus_remove+0x18/0x70 [sunqe] ]
  [f001b3b0 : of_device_remove+0x2c/0x34 ]
  [f0116f70 : __device_release_driver+0x78/0x8c ]
  [f0117308 : driver_detach+0x90/0x274 ]
  [f01164c0 : bus_remove_driver+0x7c/0xa0 ]
  [f0117524 : driver_unregister+0x10/0x1c ]
  [fe650504 : qec_exit+0x10/0x5c [sunqe] ]
  [f004cd44 : sys_delete_module+0x1cc/0x1f4 ]
  [f0011634 : syscall_is_too_hard+0x3c/0x40 ]
  [00011220 : 0x11228 ] 

  kernel BUG at net/core/dev.c:3236!
                \|/ ____ \|/
                "@'/ ,. \`@"
                /_| \__/ |_\
                   \__U_/
  rmmod(3507): Kernel bad trap [#1]
  PSR: 414000c5 PC: f01390c8 NPC: f01390cc Y: 00000000    Not tainted
  PC: <free_netdev+0x48/0x54>
  %%G: fc000000 414000e4  f01d15f8 f1bb1e60  0000000c f022b740  f12e8000 00000000
  %%O: 00000026 f01b7038  00000ca4 00000004  fc000000 00000003  f12e9b58 f01390c0
  RPC: <free_netdev+0x40/0x54>
  %%L: 419000e6 00000010  f0233044 00000010  00000004 00000000  00000000 5002a000
  %%I: f1ce1800 00000004  0000e000 f002f000  f0230c60 f0230c00  f12e9bc0 fe64f0a4
  Caller[fe64f0a4]: qec_sbus_remove+0x64/0x70 [sunqe]
  Caller[f001b3b0]: of_device_remove+0x2c/0x34
  Caller[f0116f70]: __device_release_driver+0x78/0x8c
  Caller[f0117308]: driver_detach+0x90/0x274
  Caller[f01164c0]: bus_remove_driver+0x7c/0xa0
  Caller[f0117524]: driver_unregister+0x10/0x1c
  Caller[fe650504]: qec_exit+0x10/0x5c [sunqe]
  Caller[f004cd44]: sys_delete_module+0x1cc/0x1f4
  Caller[f0011634]: syscall_is_too_hard+0x3c/0x40
  Caller[00011220]: 0x11228
  Instruction DUMP: 92102ca4  7ffb658c  90122038 <91d02005> c220a174  7fff7a57  91ee21d0  01000000  9de3bf98 


I couldn't find any evidence in the `sparclinux' mailing list archive
that this has been fixed in recent kernels.  I did find a report stating
that the module wouldn't even load on 2.6.12, though [0].

I was previously using this driver on a 2.4.26 kernel where it worked
fine.

Thanks,
Ludovic.

[0] http://www.mail-archive.com/sparclinux@vger.kernel.org/msg00235.html