[Asterisk-code-review] chan_dahdi: PRI span status may stay "Down, Active" after a short alarm (asterisk[16])

[Frederic LE FOLL]

Hello Kevin Harwell, Friendly Automation, 

I'd like you to reexamine a change. Please visit

    https://gerrit.asterisk.org/c/asterisk/+/13167

to look at the new patch set (#2).

Change subject: chan_dahdi: PRI span status may stay "Down, Active" after a short alarm
......................................................................

chan_dahdi: PRI span status may stay "Down, Active" after a short alarm

Upon a short PRI disconnection, libpri may maintain Q.921 layer 'up' and
may thus not send PRI_EVENT_DCHAN_DOWN / PRI_EVENT_DCHAN_UP events.
If pri_event_alarm() clears DCHAN_UP status bit upon alarm detection
and no Q.921 reconnection sequence occurs, chan_dahdi will keep
seeing span status "Down" at the end of alarm.

This patch modifies pri_event_alarm() in order to keep DCHAN_UP bit
unchanged. libpri will send a PRI_EVENT_DCHAN_DOWN event if it detects
a disconnection of Q.921 layer and this will clear DCHAN_UP if required.

ASTERISK-28615

Change-Id: Ibe27df4971fd4c82cc6850020bce4a8b2692c996
---
M channels/sig_pri.c
1 file changed, 1 insertion(+), 1 deletion(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/67/13167/2
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Gerrit-Project: asterisk
Gerrit-Branch: 16
Gerrit-Change-Id: Ibe27df4971fd4c82cc6850020bce4a8b2692c996
Gerrit-Change-Number: 13167
Gerrit-PatchSet: 2
Gerrit-Owner: Frederic LE FOLL <frederic.lefoll at c-s.fr>
Gerrit-Reviewer: Friendly Automation
Gerrit-Reviewer: Kevin Harwell <kharwell at digium.com>
Gerrit-MessageType: newpatchset
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