Author: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Description: Ignore failed DAHDI channels at startup
Origin: https://reviewboard.asterisk.org/r/3063

Allow DAHDI channels to be failed at startup, as it allows them to be
added later through 'dahdi create channels' from e.g. a udev hook.

--- a/configs/chan_dahdi.conf.sample
+++ b/configs/chan_dahdi.conf.sample
@@ -1159,12 +1159,11 @@
 ;
 ;
 ; ignore_failed_channels: Continue even if some channels failed to configure.
-; False by default, as if even a single channel failed to configure, it might
-; mean other channels are misplaced and having them work may not be a good
-; idea. If enabled (set to true), chan_dahdi will nevertheless attempt to
-; configure other channels rather than giving up. This normally makes sense
-; only if you use names (<subdir>!<number>) for DAHDI channels.
-;ignore_failed_channels = true
+; True by default. Disable this if you can guarantee that DAHDI starts before
+; Asterisk and want to be sure chan_dahdi will not start with broken
+; configuration.
+;
+;ignore_failed_channels = false
 ;
 ; Configure jitter buffers in DAHDI (each one is 20ms, default is 4)
 ; This is set globally, rather than per-channel.
--- a/channels/chan_dahdi.c
+++ b/channels/chan_dahdi.c
@@ -961,6 +961,7 @@
 			.debouncetime = -1
 		},
 		.is_sig_auto = 1,
+		.ignore_failed_channels = 1,
 		.smdi_port = "/dev/ttyS0",
 	};