SIM Card PIN Change Timeout (MM 1.18.2)

[Aleksander Morgado]

Hey,

>
> I've tried to fix it. Below is for review and if OK then I'll submit MR.
>
> I think, we cannot make assumption that modem will be unlocked after sim pin change. Hence, we should not wait for unlock?
>

The mm_iface_modem_update_lock_info() is not "waiting for unlock",
that method is reloading the current lock information status, and I
think that is definitely what we should be doing. The problem now is
what happens with this issue we're seeing; the modem returning Failure
unconditionally if we attempt to reload the lock status. I'm not sure
how to best workaround it, truth be told. Just wondering, have you
tried this very same sequence with the EM7455 running in QMI mode
instead of MBIM mode? Does the issue also happen there?


> diff --git a/src/mm-base-sim.c b/src/mm-base-sim.c
> index 59af3a88..8a181970 100644
> --- a/src/mm-base-sim.c
> +++ b/src/mm-base-sim.c
> @@ -201,20 +201,17 @@ handle_change_pin_ready (MMBaseSim *self,
>                           GAsyncResult *res,
>                           HandleChangePinContext *ctx)
>  {
> -    MMModemLock known_lock = MM_MODEM_LOCK_UNKNOWN;
> +    MM_BASE_SIM_GET_CLASS (self)->change_pin_finish (self, res, &ctx->save_error);
>
> -    if (!MM_BASE_SIM_GET_CLASS (self)->change_pin_finish (self, res, &ctx->save_error)) {
> -        if (g_error_matches (ctx->save_error,
> -                             MM_MOBILE_EQUIPMENT_ERROR,
> -                             MM_MOBILE_EQUIPMENT_ERROR_SIM_PUK))
> -            known_lock = MM_MODEM_LOCK_SIM_PUK;
> +    if (ctx->save_error) {
> +        g_dbus_method_invocation_return_gerror (ctx->invocation, ctx->save_error);
> +        reprobe_if_puk_discovered (ctx->self, ctx->save_error);
> +        g_clear_error (&ctx->save_error);
> +    } else {
> +        mm_gdbus_sim_complete_change_pin (MM_GDBUS_SIM (ctx->self), ctx->invocation);
>      }
>
> -    mm_iface_modem_update_lock_info (
> -        MM_IFACE_MODEM (self->priv->modem),
> -        known_lock,
> -        (GAsyncReadyCallback)after_change_update_lock_info_ready,
> -        ctx);
> +    handle_change_pin_context_free (ctx);
>  }
>
> Thanks
> Amol
>
> -----Original Message-----
> From: Aleksander Morgado <aleksander at aleksander.es>
> Sent: Monday, 8 November 2021 5:25 PM
> To: Amol Lad <Amol.Lad at 4rf.com>
> Cc: ModemManager (development) <modemmanager-devel at lists.freedesktop.org>
> Subject: Re: SIM Card PIN Change Timeout (MM 1.18.2)
>
> Hey,
>
> On Mon, Nov 8, 2021 at 11:36 AM Amol Lad <Amol.Lad at 4rf.com> wrote:
> >
> > # mmcli -i 1 --change-pin=0000 --pin=1234
> > error: couldn't change PIN code in the SIM: 'Timeout was reached'
> >
> > # mmcli -m 0 --command=AT+CPIN?
> > response: '+CPIN: SIM PIN'
> >
> > So looks like modem is 'really' locked. Btw, which part of debug log showed modem went in searching?
> >
>
> Oh, interesting. Then I wouldn't know what to say :)
>
> Here's the debug log that lead me to think the modem was unlocked already:
>
> debug 2021-11-06T06:46:28+00:00 : [/dev/cdc-wdm0] Received message...
> <<<<<< RAW:
> <<<<<<   length = 50
> <<<<<<   data   =
> 01:31:00:80:03:04:04:02:00:24:00:25:00:01:06:00:02:02:02:02:01:08:11:01:00:00:12:05:00:94:01:2D:00:00:22:05:00:01:02:00:00:00:29:05:00:94:01:2D:00:00
> debug 2021-11-06T06:46:28+00:00 : [/dev/cdc-wdm0] Received generic indication (translated)...
> <<<<<< QMUX:
> <<<<<<   length  = 49
> <<<<<<   flags   = 0x80
> <<<<<<   service = "nas"
> <<<<<<   client  = 4
> <<<<<< QMI:
> <<<<<<   flags       = "indication"
> <<<<<<   transaction = 2
> <<<<<<   tlv_length  = 37
> <<<<<<   message     = "Serving System" (0x0024)
> <<<<<< TLV:
> <<<<<<   type       = "Serving System" (0x01)
> <<<<<<   length     = 6
> <<<<<<   value      = 02:02:02:02:01:08
> <<<<<<   translated = [ registration_state =
> 'not-registered-searching' cs_attach_state = 'detached'
> ps_attach_state = 'detached' selected_network = '3gpp'
> radio_interfaces = '{ [0] = 'lte '}' ]
> <<<<<< TLV:
> <<<<<<   type       = "Data Service Capability" (0x11)
> <<<<<<   length     = 1
> <<<<<<   value      = 00
> <<<<<<   translated = {}
> <<<<<< TLV:
> <<<<<<   type       = "Current PLMN" (0x12)
> <<<<<<   length     = 5
> <<<<<<   value      = 94:01:2D:00:00
> <<<<<<   translated = [ mcc = '404' mnc = '45' description = '' ]
>
> --
> Aleksander
> https://aleksander.es
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-- 
Aleksander
https://aleksander.es