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    SubjectRe: [GIT] Networking
    On Fri, Nov 04, 2011 at 06:03:42PM +0100, Johannes Berg wrote:
    > On Tue, 2011-10-25 at 12:26 +0000, Linus Torvalds wrote:
    > > On Tue, Oct 25, 2011 at 12:32 PM, David Miller <> wrote:
    > > >
    > > > The most visible thing in here is the reorganization of the drivers
    > > > under drivers/net.
    > >
    > > Nope, the most visible thing are some new annoying warnings, that seem
    > > absolutely broken.
    > >
    > > At the very minimum, that WARN_ON(1) should be a WARN_ON_ONCE() or
    > > something like that. Because showing it over an dover again is not
    > > helpful.
    > >
    > > Added the people who signed off on the changes to the affected files,
    > > since they hopefully know why this happens and can fix it..
    > Sorry for the late reply.
    > I think this was actually caused by some changes from Ben Greear
    > "optimising" stuff in net/mac80211/work.c and keeping the wrong channel,
    > Stanislaw was also looking at this at some point I think. I agree that
    > it would be good to change to WARN_ON_ONCE(), will do that.
    > The warning itself has been around forever, but the fact that it
    > triggers now is probably related to the channel work & band switches.

    I think this problem is related with linuxcon :-) and it is not current
    regression, i.e. Ben's off-channel code was already committed in 3.0.
    I have also RHEL6 - 2.6.32 bug report about that:

    Probably there was something special on linuxcon wireless network (i.e.
    big contention) what cause people start to see this warning. Eventually
    nobody use wireless except conferences :-/

    I have one pending patch which fix other instance of the warning (started
    at ieee80211_tx_status()). I'll post it today. As Ben mentioned, two
    fixes are pending in wireless-testing tree:;a=commitdiff;h=682ba5a44516529b29fc780c055e06104d36e31e;a=commitdiff;h=776308dd5fa8a41e8bbb79818a66bd68a7db757e

    However, I'm not sure if that cover all possible situations when
    warning can be triggered. We need to do a careful review of channel
    switching in mac80211.


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