Intel XL710 broken link down detection?

[Jack Vogel]

LOL, Damn, what's the world coming to when you can't trust them Linux guys
:)

Jack




On Wed, Nov 11, 2015 at 8:31 AM, Ryan Stone <rysto32 at gmail.com> wrote:

> On Wed, Nov 11, 2015 at 11:18 AM, Steven Hartland <steven at multiplay.co.uk>
> wrote:
>
>> Comparing this to the Linux driver which does detect the link down I've
>> discovered it actually polls the link status by default in its watchdog.
>>
>> Disabling this with "ethtool --set-priv-flags eth1 LinkPolling off" and
>> the Linux driver also fails to detect link down.
>>
>> So this seems like a firmware or even hardware bug where it should be
>> reporting down events and the Linux driver has been updated to workaround
>> the problem?
>
>
> No, apparently the Linux devs just didn't read the datasheet closely
> enough (and presumably the FreeBSD driver copied the mistake).  There is a
> mask of interrupt causes that works backwards from how one would expect;
> you mask out events that you *don't* want rather than events that you do
> want.  Both the Linux and FreeBSD drivers pass a mask of events that they
> want interrupts for (the only reason why it appears to work on link up is
> that the the AN Completed event fires when link is up, as far as I can
> tell).  Try the following patch:
>
> https://people.freebsd.org/~rstone/patches/ixl_link_int.diff
>
>