Originally developed by:
Prathmesh Prabhu <pprabhu@chromium.org>
Ben Chan <benchan@chromium.org>
Huawei MU736 prematurely fires a ^NDISSTAT unsolicited message upon a
network-initiated disconnection. The modem can go into a bad state if a
reconnect attempt happens before the disconnection completes. This patch works
around the issue by delaying the reporting of the disconnection.
Originally developed by:
Ben Chan <benchan@chromium.org>
This patch replaces mm_bearer_report_disconnection() with a more generic
mm_bearer_report_connection_status(), which allows reporting any
connection status of a bearer. This further allows getting rid of those
custom report_connection_status functions in plugic specific bearer
subclasses.
Note that while plugin-specific implementations can receive multiple
'MMBearerConnectionStatus' values, the generic implementation is only allowed
to receive DISCONNECTED. Plugins need to make sure that they process all the
other status values, and only report DISCONNECTED to the parent when required.
MBM:
The MBM bearer implementation of report_connection_status() expects either
CONNECTED or DISCONNECTED. If any of these is received and there is an ongoing
connection attempt, the corresponding operation will be completed. If there is
no connection attempt, we will just handle the DISCONNECTED state, calling the
parent method to notify that the modem got network-disconnected.
Icera:
The Icera bearer implementation of report_connection_status() expects either
CONNECTED, CONNECT FAILED or DISCONNECTED. If any of these is received and
there is an ongoing connection or disconnection attempt, the corresponding
operation will be completed. If there is no connection or disconnection
attempt, we will just handle the CONNECT FAILED and DISCONNECTED states,
calling the parent method (always with DISCONNECTED) to notify that the modem
got network-disconnected.
Option/HSO:
The Option/HSO bearer implementation of report_connection_status() expects
either CONNECTED, CONNECTION FAILED or DISCONNECTED. If any of these is
received and there is an ongoing connection or disconnection attempt, the
corresponding operation will be completed. If there is no connection or
disconnection attempt, we will just handle the CONNECTION FAILED and
DISCONNECTED states, calling the parent method (always with DISCONNECTED) to
notify that the modem got network-disconnected.
Huawei:
The Huawei bearer implementation of report_connection_status() expects either
CONNECTED or DISCONNECTED. These messages are not used to process pending
connection or disconnection attempts; so if they are received while one of
these is on-going, it will just be ignored. CONNECTED reports are also
ignored, so we will just handle the DISCONNECTED state, calling the parent
method to notify that the modem got network-disconnected.
Altair-LTE:
The Altair-LTE bearers will only report DISCONNECTED on network-disconnected
cases. There is no custom report_connection_status().
Novatel-LTE:
The Novatel-LTE bearers will only report DISCONNECTED on network-disconnected
cases. There is no custom report_connection_status().
When we get an internal error while checking the lock status, tell the upper
layers that we can retry the check. It's been observed that this internal error
may be issued not only when e.g. there is no SIM, but also when the SIM is not
yet fully ready.
The new internal_load_unlock_required() method will take care of running the
subclassed load_unlock_required(), if available, and also retry the check up
to 6 times.
This method will be used both by the standard unlock required check and by the
check within the current capabilities loading for multimode devices.
This patch changes MMBroadbandModemHuawei to use ^NDISSTAT unsolicited
messages to handle network-initiated disconnection. As a ^NDISSTAT
unsolicited message is similar to a ^NDISSTATQRY response, the patch
extends the ^NDISSTATQRY parser code to handle both ^NDISSTAT and
^NDISSTATQRY responses.
This patch fixes own_enable_unsolicited_events_ready() to use
mm_base_modem_at_command_full_finish(), instead of
mm_base_modem_at_sequence_full_finish(), as the %STATCM=1 command is
issued via mm_base_modem_at_command_full().
See commit c79d266e62.
If the rules to tag specific USB interface numbers only apply on the PID, we'll
end up seeing that if the port has a parent with another PID, and that other
PID also has a rule, port will get tagged multiple times.
This patch fixes an assertion failure 'ctx->fatal_error == NULL' in
initialization_context_complete_and_free(), which happens if
'fatal_error' of the initialization context is set during the modem
interface initialization and the initialization is later cancelled.
This patch changes MMBroadbandModem to report an
org.freedesktop.ModemManager1.Error.Core.InProgress error, instead of an
org.freedesktop.ModemManager1.Error.Core.WrongState error, when one
tries to initialize a modem that is already being initialized, or to
enable a modem that is already being enabled.
The Huawei MU736 supports CIND? but not for signal quality reporting:
AT+CIND=?
+CIND : ("call",(0,1)), ("message",(0,1)), ("roam",(0,1))
OK
AT+CIND?
+CIND:0,0,0
OK
Which ended up with the following during execution:
ModemManager[3044]: (ttyUSB1) Could not parse CIND signal quality results;
signal index (255) outside received range (0-3)
Just avoid this, and make CIND? be used for signal quality retrieval only if
(1) CIND? is actually supported and (2) CIND? reports signal quality
information.
Just add the messages with debug level, so that they don't get reported at
syslog. Having this kind of warnings in syslog is not useful, specially because
we wouldn't know which was the specific command that issued the warning. Errors
due to critical issues will anyway be reported in syslog in some way or another.
Don't query udev for the tag every time we recreate a bearer, just do it once.
For some reason, re-querying the same tag after the first time doesn't always
return the proper result.
This patch fixes the following uninitialized variable issues, which was
introduced in the previous commit "huawei: retry connect/disconnect attempt
upon ^NDISSTATQRY? failures" (commit 57c657bd06).
huawei/mm-broadband-bearer-huawei.c:127:9: error: variable 'ipv4_available' is used uninitialized whenever '||' condition is true
[-Werror,-Wsometimes-uninitialized]
if (!response ||
^~~~~~~~~
huawei/mm-broadband-bearer-huawei.c:141:9: note: uninitialized use occurs here
if (ipv4_available && ipv4_connected) {
^~~~~~~~~~~~~~
huawei/mm-broadband-bearer-huawei.c:127:9: note: remove the '||' if its condition is always false
if (!response ||
^~~~~~~~~~~~
huawei/mm-broadband-bearer-huawei.c:115:28: note: initialize the variable 'ipv4_available' to silence this warning
gboolean ipv4_available;
^
= 0
huawei/mm-broadband-bearer-huawei.c:484:9: error: variable 'ipv4_available' is used uninitialized whenever '||' condition is true
[-Werror,-Wsometimes-uninitialized]
if (!response ||
^~~~~~~~~
huawei/mm-broadband-bearer-huawei.c:498:9: note: uninitialized use occurs here
if (ipv4_available && !ipv4_connected) {
^~~~~~~~~~~~~~
huawei/mm-broadband-bearer-huawei.c:484:9: note: remove the '||' if its condition is always false
if (!response ||
^~~~~~~~~~~~
huawei/mm-broadband-bearer-huawei.c:472:28: note: initialize the variable 'ipv4_available' to silence this warning
gboolean ipv4_available;
^
= 0
The Huawei MU736 modem sometimes responds to the ^NDISSTATQRY? query with a
'+CME ERROR: 100' error. This patch works around the issue by ignoring a few
of these error responses in a connect / disconnect attempt. The overall timeout
for the connect/disconnect operation is not affected by this change.
