> > AFAIR there was a patch a while ago from Mellanox guys that was possibly
> > extending the link notification with an error cause, this sounds like
> > something that could be useful to report to user space somehow to help
> > troubleshoot link down events.
> >
> Do you by chance have a reference to this patch? There's heavy development
> on the Mellanox drivers with a lot of patches.
Hi Heiner, Florian
A general mechanism has been added to allow error messages to be
reported via netlink sockets. I think wifi was the first to actually
make use of it, since i think Johannes Berg did the core work, but
other parts of the stack have also started using it.
Just picking a commit at random, maybe not the best of examples:
Fixes: 768075ebc238 ("nl80211: add a few extended error strings to key parsing")
Andrew
