e1000 vlan functionality broken in 3.1

e1000 vlan functionality broken in 3.1

[Josh Boyer]

Hi All,

We've had a couple of reports of the e1000 driver no longer working with
tagged VLANs in the 3.1 kernel.  The bug report has much more detail
here:

https://bugzilla.redhat.com/show_bug.cgi?id=754589

The summary is, if you turn of rxvlan and tx offloading, the driver
seems to work fine with 3.1 again whereas this wasn't needed on 3.0.
(Fedora calls 3.0 2.6.40 on Fedora 15, but that is strictly a naming
thing.)

Looking through the commit logs, 5622e4044a91 seems to be the most
relevant commit between those versions.  Does anyone have any ideas?

josh

Re: e1000 vlan functionality broken in 3.1

[Jiri Pirko]

Mon, Nov 21, 2011 at 08:28:39PM CET, jwboyer@redhat.com wrote:
>Hi All,
>
>We've had a couple of reports of the e1000 driver no longer working with
>tagged VLANs in the 3.1 kernel.  The bug report has much more detail
>here:
>
>https://bugzilla.redhat.com/show_bug.cgi?id=754589
>
>The summary is, if you turn of rxvlan and tx offloading, the driver
>seems to work fine with 3.1 again whereas this wasn't needed on 3.0.
>(Fedora calls 3.0 2.6.40 on Fedora 15, but that is strictly a naming
>thing.)
>
>Looking through the commit logs, 5622e4044a91 seems to be the most
>relevant commit between those versions.  Does anyone have any ideas?


Looking at the patch again, I do not see anything suspicious. Plus the
bugzilla is talking about carrupting tx packets which is really odd. One
thing I can think of is if maybe VLAN tag inserting/striping and enable
VLAN receive filtering might be needed to be enabled/disabled together.
Intel guys should be able to tell.

Thanks.

Jirka

>
>josh