an0: device timeout on x31

Sepherosa Ziehau sepherosa at
Sun May 18 02:17:32 PDT 2008

On Sun, May 18, 2008 at 5:02 PM, Jost Tobias Springenberg
<jspringe at> wrote:
> Okay,
> unfortunately the system still freezes if i have traffic on the an0.

Do you mean even low rate traffic like ping?

> Tried to incorporate the patch into 12.1 release just to make sure it has nothing to do with
> latest changes but still the same problem remains.
> Could anyone give me a brief idea on how to track that freeze down ?

Things like:
- write to IO registers when device is not initialized yet or when
device is powered off
- write to IO registers that do not exist
- Initialize RX/TX ring related IO registers, before RX/TX ring is initialized.
- RX/TX ring is not correctly initialized
- buffer is (wrongly) freed/trashed when device is doing DMA

Best Regards,

Live Free or Die

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