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David S. Miller wrote:
> From: "Michael Chan" <[email protected]>
> Date: Tue, 21 Feb 2006 08:44:20 -0800
>
>> On Mon, 2006-02-20 at 14:43 -0500, Jeff Mahoney wrote:
>>> This patch moves the netif_carrier_off() call from tg3_init_one()->
>>> tg3_init_link_config() to tg3_open() as is the convention for most
>>> other network drivers.
>> I think moving netif_carrier_off() later is the right thing to do. We
>> can also move it to the end of tg3_init_one() just before returning 0.
>
> Agreed.
>
>>> I was getting a panic after a tg3 device failed to initialize due to DMA
>>> failure. The oops pointed to the link watch queue with spinlock debugging
>>> enabled. Without spinlock debugging, the Oops didn't occur.
>>>
>>> I suspect that the link event was getting queued but not executed until
>>> after the DMA test had failed and the device was freed. The link event
>>> was then operating on freed memory, which could contain anything. With this
>>> patch applied, the Oops no longer occurs.
>> DMA test failed? What NIC device do you have? How did it fail?
>
> I get this too with an old 5700 3COM card on sparc64. I'll get
> you some more detailed info later today, hopefully.
>
> Jeff, please get some details for Michael about your failure
> case. Thanks.
dmesg after modprobe tg3:
tg3.c:v3.49 (Feb 2, 2006)
ACPI: PCI Interrupt 0000:0a:02.0[A] -> GSI 24 (level, low) -> IRQ 201
Uhhuh. NMI received for unknown reason 21 on CPU 0.
Dazed and confused, but trying to continue
Do you have a strange power saving mode enabled?
tg3_test_dma() Write the buffer failed -19
tg3: DMA engine test failed, aborting.
relevant lspci output:
0000:0a:02.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5701
Gigabit Ethernet (rev 15)
Subsystem: Compaq Computer Corporation NC7770 Gigabit Server
Adapter (PCI-X, 10/100/1000-T)
Flags: 66Mhz, medium devsel, IRQ 201
Memory at f7df0000 (64-bit, non-prefetchable) [size=64K]
Expansion ROM at dc080000 [disabled] [size=64K]
Capabilities: [40] PCI-X non-bridge device.
Capabilities: [48] Power Management version 2
Capabilities: [50] Vital Product Data
Capabilities: [58] Message Signalled Interrupts: 64bit+
Queue=0/3 Enable-
If you need more details, I can try to dig them up. This is a machine
I've only been using for a few days for some testing and I'm not yet
familiar with all the hardware details.
- -Jeff
- --
Jeff Mahoney
SUSE Labs
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