APPLIED: [trusty] mac80211: don't validate unchanged AP bandwidth while tracking

[Tim Gardner]

On 03/19/2014 03:45 AM, AceLan Kao wrote:
> BugLink: https://bugs.launchpad.net/bugs/1294558
>
> We need a commit which has been in v3.14-rc6 to fix a 802.11ac
> connection problem.
> I've verified this commit fixes the issue on a Intel 7260 wifi chip.
>
> commit 963a1852fbac4f75a2d938fa2e734ef1e6d4c044
> Author: Johannes Berg <johannes.berg at intel.com>
> Date:   Fri Feb 21 20:34:34 2014 +0100
>
>      mac80211: don't validate unchanged AP bandwidth while tracking
>
>      The MLME code in mac80211 must track whether or not the AP changed
>      bandwidth, but if there's no change while tracking it shouldn't do
>      anything, otherwise regulatory updates can make it impossible to
>      connect to certain APs if the regulatory database doesn't match the
>      information from the AP. See the precise scenario described in the
>      code.
>
>      This still leaves some possible problems with CSA or if the AP
>      actually changed bandwidth, but those cases are less common and
>      won't completely prevent using it.
>
>      This fixes https://bugzilla.kernel.org/show_bug.cgi?id=70881
>
>      Cc: stable at vger.kernel.org
>      Reported-and-tested-by: Nate Carlson <kernel at natecarlson.com>
>      Signed-off-by: Johannes Berg <johannes.berg at intel.com>
>


-- 
Tim Gardner tim.gardner at canonical.com