Parallel enables occurring (when SIM PIN enabled)

[Colin Helliwell]

> On 25 April 2017 at 15:43 Dan Williams <dcbw at redhat.com> wrote:
> 
> On Tue, 2017-04-25 at 10:32 +0200, Aleksander Morgado wrote:
> 
> > On Tue, Apr 25, 2017 at 10:20 AM, Colin Helliwell
> > 
> > <colin.helliwell at ln-systems.com> wrote:
> > 
> > > I've encountered a problem when using MM with Network Manager, when
> > > the SIM PIN is enabled - in short it seems that MM is able to hit a
> > > state where two 'enable' operations are happening in parallel, one
> > > from unlocking the SIM and one from starting the 'simple connect'.
> > > The detail and discussion so far has been over at http://www.mail-a
> > > rchive.com/networkmanager-list at gnome.org/msg27008.html , but it
> > > does seem to be an issue that essentially lies in MM.
> > 
> > Could you open a new bugreport in bugzilla and attach the relevant
> > logs there as well? I believe we should track this.
> > https://bugs.freedesktop.org/enter_bug.cgi?product=ModemManager
> 
> He originated this thread on the NM list (not sure if you saw it there)
> and I diagnosed what was going on from an internal perspective. It's a
> race between the state change to ENABLING and the polkit auth stuff.
> We need to check right after the polkit auth that our state hasn't
> changed already due to another request, and then do the right thing
> (either return an error or allow the specific op to proceed).
> 
> Dan

I didn't mention this before Dan, since your experimental patch did help and thus seemed a generally worthy theory - but in fact I'm building MM without polkit ("--without-polkit")