an0: device timeout on x31

Sepherosa Ziehau sepherosa at
Sun May 18 03:27:47 PDT 2008

On Sun, May 18, 2008 at 6:22 PM, Sepherosa Ziehau <sepherosa at> wrote:
> On Sun, May 18, 2008 at 6:01 PM, Jost Tobias Springenberg
> <jspringe at> wrote:
>>> Do you mean even low rate traffic like ping?
>> Nope that works fine only if I try to transfer i.e. a tarball.
>>> 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
>> What really strikes me is the following:
>> I tried 12.1 release and HEAD without any changes, just as they are in the repos.
>> On 12.1 livecd I get the errors that I wrote about in my first post,
>> but no freezes at all, even if transferring files (although performance is horrible due to the massive timeouts).
>> While using HEAD the system shows the same behavior but freezes after a few pings ...
>> That suggests that the problem is not due to the changes I made but a more general bug !?
>> What has changed in the network related areas since 12.1 ?
>> May it be related to Sephes changes ?
> Maybe, can you break into DDB when freezing happens?

Its a bug in the driver about how IFF_OACTIVE should be handled.  I
will work out a fix.

Best Regards,

Live Free or Die

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