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iface-modem: fix invalid modem state consolidation

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ModemManager has a bogus modem state transition from 'enabling' to 'disabled':

ModemManager[26214]: <info>  Modem fully enabled...
ModemManager[26214]: <info>  Modem /org/freedesktop/ModemManager1/Modem/2: state changed (enabling -> disabled)

The root cause seems to be the following:

get_current_consolidated_state() in MMIfaceModem returns
MM_MODEM_STATE_DISABLED as the default fallback value. When
mm_iface_modem_update_state() is invoked to transition the modem state from
MM_MODEM_STATE_ENABLING to MM_MODEM_STATE_ENABLED, the following code can
potentially cause the final state to be MM_MODEM_STATE_DISABLED instead.

     /* Enabled may really be searching or registered */
     if (new_state == MM_MODEM_STATE_ENABLED)
         new_state = get_current_consolidated_state (self);

https://code.google.com/p/chromium-os/issues/detail?id=38173
This commit is contained in:
Ben Chan
2013-01-23 17:16:52 -08:00
committed by Aleksander Morgado
parent 9d5794e9e4
commit 69aff6183a
1 changed files with 8 additions and 7 deletions
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15
src/mm-iface-modem.c
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@@ -205,7 +205,7 @@ mm_iface_modem_wait_for_final_state (MMIfaceModem *self,
/*****************************************************************************/
static MMModemState get_current_consolidated_state (MMIfaceModem *self);
static MMModemState get_current_consolidated_state (MMIfaceModem *self, MMModemState modem_state);
typedef struct {
MMBearer *self;
@@ -270,7 +270,7 @@ bearer_status_changed (MMBearer *bearer,
new_state = MM_MODEM_STATE_DISCONNECTING;
break;
case MM_BEARER_STATUS_DISCONNECTED:
new_state = get_current_consolidated_state (self);
new_state = get_current_consolidated_state (self, state);
break;
}
@@ -1184,7 +1184,7 @@ mm_iface_modem_update_state (MMIfaceModem *self,
/* Enabled may really be searching or registered */
if (new_state == MM_MODEM_STATE_ENABLED)
new_state = get_current_consolidated_state (self);
new_state = get_current_consolidated_state (self, new_state);
/* Update state only if different */
if (new_state != old_state) {
@@ -1260,9 +1260,9 @@ subsystem_state_array_free (GArray *array)
}
static MMModemState
get_current_consolidated_state (MMIfaceModem *self)
get_current_consolidated_state (MMIfaceModem *self, MMModemState modem_state)
{
MMModemState consolidated = MM_MODEM_STATE_DISABLED;
MMModemState consolidated = modem_state;
GArray *subsystem_states;
if (G_UNLIKELY (!state_update_context_quark))
@@ -1293,6 +1293,7 @@ get_current_consolidated_state (MMIfaceModem *self)
static MMModemState
get_updated_consolidated_state (MMIfaceModem *self,
MMModemState modem_state,
const gchar *subsystem,
MMModemState subsystem_state)
{
@@ -1345,7 +1346,7 @@ get_updated_consolidated_state (MMIfaceModem *self,
g_array_append_val (subsystem_states, s);
}
return get_current_consolidated_state (self);
return get_current_consolidated_state (self, modem_state);
}
void
@@ -1364,7 +1365,7 @@ mm_iface_modem_update_subsystem_state (MMIfaceModem *self,
/* We may have different subsystems being handled (e.g. 3GPP and CDMA), and
* the registration status value is unique, so if we get subsystem-specific
* state updates, we'll need to merge all to get a consolidated one. */
consolidated = get_updated_consolidated_state (self, subsystem, new_state);
consolidated = get_updated_consolidated_state (self, state, subsystem, new_state);
/* Don't update registration-related states while disabling/enabling */
if (state == MM_MODEM_STATE_ENABLING ||