netdev - Re: [PATCHv2 wpan-next 0/2] mac802154: atomic_dec_and

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Message-ID: <20220615110800.6b17960b@xps-13>
Date:   Wed, 15 Jun 2022 11:08:00 +0200
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     Alexander Aring <aahringo@...hat.com>
Cc:     Stefan Schmidt <stefan@...enfreihafen.org>,
        linux-wpan - ML <linux-wpan@...r.kernel.org>,
        Network Development <netdev@...r.kernel.org>
Subject: Re: [PATCHv2 wpan-next 0/2] mac802154: atomic_dec_and_test() fixes


miquel.raynal@...tlin.com wrote on Wed, 15 Jun 2022 09:25:58 +0200:

> Hi Alex,
> 
> aahringo@...hat.com wrote on Tue, 14 Jun 2022 22:53:19 -0400:
> 
> > Hi,
> > 
> > On Mon, Jun 13, 2022 at 10:15 AM Miquel Raynal
> > <miquel.raynal@...tlin.com> wrote:
> > >
> > > Hi Alex,
> > >
> > > aahringo@...hat.com wrote on Mon, 13 Jun 2022 00:37:33 -0400:
> > >  
> > > > Hi,
> > > >
> > > > I was wondering why nothing worked anymore. I found it...
> > > >
> > > > changes since v2:
> > > >
> > > >  - fix fixes tags in mac802154: util: fix release queue handling
> > > >  - add patch mac802154: fix atomic_dec_and_test checks got somehow
> > > >    confused 2 patch same issue  
> > >
> > > I've got initially confused with your patchset but yes indeed the API
> > > works the opposite way compared to my gut understanding.
> > >  
> > 
> > not the first time I am seeing this, I fixed similar issues already at
> > other places.
> > 
> > btw I told you the right semantic at [0] ....
> 
> I focused on the if statement more than the actual syntax...
> 
> > 
> > > We bought hardware and I am currently setting up a real network to
> > > hopefully track these regressions myself in the future.
> > >  
> > 
> > I wonder why you don't use hwsim... and you already mentioned hwsim to
> > me.
> 
> I do use hwsim but I was exclusively testing the mlme ops with it.
> 
> > You can simply make a 6lowpan interface on it and ping it - no
> > hardware needed and this would already show issues...
> 
> Actually I just learnt about how to create 6lowpan interfaces and do
> basic data exchanges, it's rather easy and straightforward, but I must
> admit I was not familiar at all with this area and thought it would be
> more complex... Indeed, hwsim would work just fine for this purpose,
> I will add this to my checklist.
> 
> > Now you can say,
> > why I do not test it... maybe I do next time but review takes longer
> > then.
> 
> I'm not saying this at all :) It is my duty, not yours, reviews and
> feedback are more than enough.

Ok 6lowpan is _really_ well integrated, apologies for not taking the
time to use it before.

BTW I see all around the internet that ping6 produces this warning:

	ping6: Warning: source address might be selected on device
	other than: lowpan0

At a first glance I could not find an explanation, do you also have it
on your side? Do you know what it means?


Thanks,
Miquèl