Re: [PATCH 1/4] Add: Online property to modem

[Denis Kenzior <denkenz@gmail.com>]

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Hi Pekka,

> 2010/5/27 Denis Kenzior <denkenz@gmail.com>:
> > Patch has been applied, however I did some refactoring afterward.  Please
> > test that I didn't break something.
> 
> There is now a race condition in online/offline and sim hotswap. With
> imperfect hw a missing sim gets detected only when modem attempts to
> register to network and actually tries to read something from sim
> card. I have no idea if the missing sim can be reported before +cops
> command response is returned.

Sorry, but how does such a modem even get to the sim ready state?  oFono reads 
the IMSI before it even tries to send post_sim, and you certainly can't read 
the IMSI without a sim card.

Or are you talking about an emergency call case here?

> 
> However, at least isimodem needs explicitly told to go offline when
> sim gets removed.
> 

My thinking is that the modem drivers can take care of this.  The core needs 
to be kept simple here and assume an 'ideal' implementation.

I'm still having trouble understanding how we'll support emergency calls with 
no SIM with this framework though.

Regards,
-Denis