From 80cf412e83d1be49ac014890e4941d1e5a15326b Mon Sep 17 00:00:00 2001
From: Cosimo Cecchi <cosimo@endlessm.com>
Date: Sun, 26 May 2019 09:54:42 -0700
Subject: [PATCH] modemManager: improve check for CDMA system identifier

Upon construction of the CDMA modem proxy, _reloadCdmaOperatorName()
is called and the value of the Sid property is read.
That property is defined as UINT32 in the D-Bus interface, but the
value may not be loaded yet after the proxy is constructed, in which
case its value will be null.

In _findProviderForSid(), we'll end up calling lookup_cdma_sid(null)
which fails with the following assertion:

gnome-shell[1082]: nma_mobile_providers_database_lookup_cdma_sid: assertion 'sid > 0' failed

This commit changes the (sid == 0) check in _findProviderForSid()
to (!sid) which will also catch the null case.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/555
---
 js/misc/modemManager.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/js/misc/modemManager.js b/js/misc/modemManager.js
index 7c6c39a73..33088644d 100644
--- a/js/misc/modemManager.js
+++ b/js/misc/modemManager.js
@@ -71,7 +71,7 @@ function _findProviderForMccMnc(operator_name, operator_code) {
 // Tries to find the operator name corresponding to the given SID
 //
 function _findProviderForSid(sid) {
-    if (sid == 0)
+    if (!sid)
         return null;
 
     let mpd = _getMobileProvidersDatabase();