live_dahdi: properly unload EC modules

Copy sruffel's fix to the init.d script from -tools.


git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@8818 a0bf4364-ded3-4de4-8d8a-66a801d63aff

1 files changed, 17 insertions, 4 deletions

diff --git a/build_tools/live_dahdi b/build_tools/live_dahdi
index 19a437c..f31cb7f 100755
--- a/build_tools/live_dahdi
+++ b/build_tools/live_dahdi
@@ -132,14 +132,27 @@ unload_module() {
 	set -- $line
 	# $1: the original module, $2: size, $3: refcount, $4: deps list
 	mods=`echo $4 | tr , ' '`
+	ec_modules=""
 	# xpp_usb keeps the xpds below busy if an xpp hardware is
 	# connected. Hence must be removed before them:
 	case "$module" in xpd_*) mods="xpp_usb $mods";; esac
+
 	for mod in $mods; do
-		# run in a subshell, so it won't step over our vars:
-		(unload_module $mod) 
-		# TODO: the following is probably the error handling we want:
-		# if [ $? != 0 ]; then return 1; fi
+		case "$mod" in
+		dahdi_echocan_*)
+			ec_modules="$mod $ec_modules"
+			;;
+		*)
+			# run in a subshell, so it won't step over our vars:
+			(unload_module $mod)
+			;;
+		esac
+	done
+	# Now that all the other dependencies are unloaded, we can unload the
+	# dahdi_echocan modules.  The drivers that register spans may keep
+	# references on the echocan modules before they are unloaded.
+	for mod in $ec_modules; do
+		(unload_module $mod)
 	done
 	rmmod $module
 }