Machine check in 4xx ethernet driver

[Josh Boyer]

On Mon, Mar 09, 2009 at 03:53:25AM -0700, Felix Radensky wrote:
>
>
>
>Josh Boyer-4 wrote:
>> 
>> On Mon, Mar 09, 2009 at 12:47:02AM -0700, Felix Radensky wrote:
>>>
>>>Hi,
>>>
>>>I'm getting machine check exception when trying to dump
>>>emac registers on 405EX Kilauea board. The kernel is 2.6.29-rc7
>>>The problem seems not new, I can reproduce it on 2.6.25 Denx kernel
>> 
>> I've not looked at what that code path does, but the EMAC regs are
>> in DCR space, not MMIO.  Using memcpy_fromio there seems odd.
>> 
>> 
>
>At least on 405EX MAL registers are in DCR space, but EMAC and RGMII
>ones are in MMIO space.

Ah, quite right.  No coffee yet this morning.

You'll need to look at the code path ethtool is forcing.  Perhaps it's doing
something stupid.

josh