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Date: Mon, 9 Apr 2012 16:03:22 +0200
From: Michael Leun <lkml20120218@newton.leun.net>
To: Mohammed Shafi <shafi.wireless@gmail.com>
Cc: Ben Greear <greearb@candelatech.com>, casteyde.christian@free.fr,
	Kelly Anderson <kelly@silka.with-linux.com>,
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Subject: Re: 3.4-rc ath9k regression (Re: [ath9k-devel] 3.3.1 ath9k
 regression)
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On Mon, 9 Apr 2012 12:25:49 +0200
Michael Leun <lkml20120218@newton.leun.net> wrote:

> On Mon, 9 Apr 2012 11:58:06 +0530
> Mohammed Shafi <shafi.wireless@gmail.com> wrote:
> 
> > On Mon, Apr 9, 2012 at 4:38 AM, Michael Leun
> > <lkml20120218@newton.leun.net> wrote:
> > > After an suspend to disk / resume cycle (in kernel suspend to
> > > disk, openSuSE) with 3.4-rc2 my ath9k wireless does not ping
> > > anymore.
> > >
> > > Output of iwconfig wlan0 looks just as usual (associated to AP).
> > >
> > > iwconfig wlan0 essid <myssid> fixes this (causes an
> > > deauthenticate/authenticate with AP) - then connectivity is there
> > > again.
> > >
> > > Guess what: "Of course" does not happen when reverting
> > > c1afdaff90538ef085b756454f12b29575411214 ath9k: fix going to
> > > full-sleep on PS idle.
> > >
> > > So, in my opinion it should be seriously considered to revert that
> > > patch until it is fully understood what is going on and why.
> > 
> > please try with the attached patch to see if it helps.
> 
> Yes, this patch helps with the issue I see in 3.4-rc2 described above.

Sorry, but I have to partially rectify that:

It works, if the time the machine was suspended is short, as it was
when I did that testing.

But I noticed it failing, when the machine was hibernated for some
hours.

I easily can reproduce that, when I reboot the AP while the notebook is
down (btw: AP is TP-LINK TL-WR1043ND running OpenWRT backfire 10.03.1,
also using ath9k).

When I do this (hibernate notebook, reboot AP, resume notebook check
connectivity) with 3.4-rc2 and your test.patch it fails in 100% of
cases.

With 3.4-rc2 and c1afdaff90538ef085b756454f12b29575411214 reverted the
same works in 100% of cases.

> But I agree with Ben and Sergio that it does NOT help with the issue
> in 3.3.1 we all see.

I mixed up some mails and actually thought Ben had already answered
regarding your patch, but that is not true.

-- 
MfG,

Michael Leun


From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michael Leun <lkml20120218@newton.leun.net>
Date: Mon, 9 Apr 2012 16:03:22 +0200
Subject: [ath9k-devel] 3.4-rc ath9k regression (Re: 3.3.1 ath9k
 regression)
In-Reply-To: <20120409122549.7469543a@xenia.leun.net>
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	<CAD2nsn2ONstURLWBSPkNrDfFOeePWMWGQeGrEUkU3Wh4kUo+sg@mail.gmail.com>
	<4F7AAAD9.2040307@silka.with-linux.com>
	<CAD2nsn0G8_vDQug-u=4PRWMwRLPX-zp1z0X5gOVNaxk=V+daWw@mail.gmail.com>
	<CAD2nsn0kogfuMhCN7tNNkiKF4PN-mG2Fa3gu0CGfw01qj-MWyg@mail.gmail.com>
	<4F7AB6FE.3080009@silka.with-linux.com>
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	<20120404235104.682cfad3@xenia.leun.net>
	<4F7DE3A4.1040705@candelatech.com>
	<CAD2nsn16AozFF2QhiY063-48bKiXdyQLmSqJLLHPpsZ3H3JtHQ@mail.gmail.com>
	<4F7F52BD.7060906@candelatech.com>
	<20120409010816.36244f17@xenia.leun.net>
	<CAD2nsn3-C8ZLmUpTDeA6HuPr-+=V5KkPJb6h5e7ZJsGi4v9p0g@mail.gmail.com>
	<20120409122549.7469543a@xenia.leun.net>
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On Mon, 9 Apr 2012 12:25:49 +0200
Michael Leun <lkml20120218@newton.leun.net> wrote:

> On Mon, 9 Apr 2012 11:58:06 +0530
> Mohammed Shafi <shafi.wireless@gmail.com> wrote:
> 
> > On Mon, Apr 9, 2012 at 4:38 AM, Michael Leun
> > <lkml20120218@newton.leun.net> wrote:
> > > After an suspend to disk / resume cycle (in kernel suspend to
> > > disk, openSuSE) with 3.4-rc2 my ath9k wireless does not ping
> > > anymore.
> > >
> > > Output of iwconfig wlan0 looks just as usual (associated to AP).
> > >
> > > iwconfig wlan0 essid <myssid> fixes this (causes an
> > > deauthenticate/authenticate with AP) - then connectivity is there
> > > again.
> > >
> > > Guess what: "Of course" does not happen when reverting
> > > c1afdaff90538ef085b756454f12b29575411214 ath9k: fix going to
> > > full-sleep on PS idle.
> > >
> > > So, in my opinion it should be seriously considered to revert that
> > > patch until it is fully understood what is going on and why.
> > 
> > please try with the attached patch to see if it helps.
> 
> Yes, this patch helps with the issue I see in 3.4-rc2 described above.

Sorry, but I have to partially rectify that:

It works, if the time the machine was suspended is short, as it was
when I did that testing.

But I noticed it failing, when the machine was hibernated for some
hours.

I easily can reproduce that, when I reboot the AP while the notebook is
down (btw: AP is TP-LINK TL-WR1043ND running OpenWRT backfire 10.03.1,
also using ath9k).

When I do this (hibernate notebook, reboot AP, resume notebook check
connectivity) with 3.4-rc2 and your test.patch it fails in 100% of
cases.

With 3.4-rc2 and c1afdaff90538ef085b756454f12b29575411214 reverted the
same works in 100% of cases.

> But I agree with Ben and Sergio that it does NOT help with the issue
> in 3.3.1 we all see.

I mixed up some mails and actually thought Ben had already answered
regarding your patch, but that is not true.

-- 
MfG,

Michael Leun