On 03/08/2013 09:34 PM, John W. Linville wrote:
On Thu, Mar 07, 2013 at 04:46:30PM +0100, Wojciech Dubowik wrote:
On 03/07/2013 03:59 PM, Felix Fietkau wrote:
On 2013-03-07 3:31 PM, Wojciech Dubowik wrote:
There is a regression introduced by this patch when power save is off on
the station for idle checks.
I have AR9590 station with rx and tx chain set to 0x1 connected
to legacy AP (based on Ar9390) with RF cable and 40dB attenuator.
Before this patch in connection polling the station was properly sending
null function to check whether AP is still there. After this patch it sends
broadcast probe request which is anyway wrong or some 16 or so packets
of random data (rarely). It manifests itself in lost connection because
there
is no ack from AP which is expected for null function.
I have been following skb's up to the descriptor setting in ath9k and it was
all ok i.e. proper null function with valid addresses.
I have been bisecting it twice because it doesn't make much sense but maybe
it's a HW issue?
You're right, it does not make much sense. I can't figure out how this
patch could possibly change the runtime behavior with tx chainmask set
to 0x1. Have you tried reverting this patch in a current build to see if
that fixes the issue?
It does fix it. I will check tomorrow whether it's only AR9590 or also
previous revisions. I will also try with different chainmasks. I will have
to rescrew my setup...
Do I need to revert this one? Or is there a new fix coming?
I guess we have to figure out first what's going on. I guess in most
cases users select anyway power save, all antennas and don't care
what happens in idle time so they won't see it.
It could be some inconsistency with antenna setting between ath9k
and mac80211. I am looking into it and I guess Felix as well.
Wojtek
Wojtek
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