SymbX/ModemManager
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base-modem: override disable operations done before modem object removal

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If we are going to inhibit the modem or fully reprobe it after a SIM
switch event, we should forbid further operations done with the modem
object.

This logic can be tested by queing different operations one after the
other, and then adding a last device inhibition ("override" operation)
that should trigger the early abort of all non-running operations,
e.g.:
  mmcli -m a -e &
  sleep 0.2
  mmcli -m a --3gpp-set-initial-eps-bearer-settings="apn=internet,ip-type=ipv4v6,force=true" &
  sleep 0.2
  mmcli -m a -d &
  sleep 0.2
  mmcli -m a -e &
  sleep 0.2
  mmcli -m a --set-power-state-low &
  sleep 0.2
  mmcli -m a -e &
  sleep 0.2
  mmcli -m a --inhibit

This previous sequence produces MM logs as follows:
  <dbg> [1726567756.430308] [modem0] [operation 22] default - enable: scheduled
  <dbg> [1726567756.430806] [modem0] [operation 22] default - enable: lock acquired
  <dbg> [1726567756.623746] [modem0] [operation 23] default - set-initial-eps-bearer-settings: scheduled
  <dbg> [1726567756.751743] [modem0] [operation 22] default - enable: lock released
  <dbg> [1726567756.752027] [modem0] [operation 23] default - set-initial-eps-bearer-settings: lock acquired
  <dbg> [1726567756.823739] [modem0] [operation 24] default - disable: scheduled
  <dbg> [1726567757.049581] [modem0] [operation 25] default - enable: scheduled
  <dbg> [1726567757.250165] [modem0] [operation 26] default - set-power-state: scheduled
  <dbg> [1726567757.450518] [modem0] [operation 27] default - enable: scheduled
  <dbg> [1726567757.676362] [modem0] [operation 28] override - disabling: override requested - no new operations will be allowed
  <dbg> [1726567757.678792] [modem0] [operation 24] default - disable: aborted early
  <dbg> [1726567757.679866] [modem0] [operation 25] default - enable: aborted early
  <dbg> [1726567757.680157] [modem0] [operation 26] default - set-power-state: aborted early
  <dbg> [1726567757.680496] [modem0] [operation 27] default - enable: aborted early
  <dbg> [1726567759.695780] [modem0] [operation 23] default - set-initial-eps-bearer-settings: lock released
  <dbg> [1726567759.695935] [modem0] [operation 28] override - disabling: lock acquired
  <dbg> [1726567759.872196] [modem0] [operation 28] override - disabling: lock released
This commit is contained in:
Aleksander Morgado
2024-09-30 11:07:11 +00:00
parent 0aef4c422f
commit dfc0f8ebfd
5 changed files with 36 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/mm-device.c
+4 -1
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@@ -748,9 +748,12 @@ mm_device_inhibit (MMDevice *self,
g_assert (!self->priv->inhibited);
self->priv->inhibited = TRUE;
/* Make sure modem is disabled while inhibited */
/* Make sure modem is disabled while inhibited. This operation requests
* an exclusive lock marked as override, so the modem object will not
* allow any additional lock request any more. */
mm_base_modem_disable (self->priv->modem,
MM_BASE_MODEM_OPERATION_LOCK_REQUIRED,
MM_BASE_MODEM_OPERATION_PRIORITY_OVERRIDE,
(GAsyncReadyCallback)inhibit_disable_ready,
task);
}