From c4c3a856adf5c9a65acf7f8efa6b5f7362bdbeaa Mon Sep 17 00:00:00 2001
From: Pau Espin Pedrol <pespin@sysmocom.de>
Date: Fri, 16 Sep 2022 19:24:07 +0200
Subject: [PATCH] ipaccess: Call line->ops->sign_link_down() only if set

This op must not necessarily be set by the user, so check if it is set
before calling it.

Change-Id: I666c5bbf157fe604e336df44f7eac098572d42ba
---
 src/input/ipaccess.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/input/ipaccess.c b/src/input/ipaccess.c
index 94d2baf..42dd942 100644
--- a/src/input/ipaccess.c
+++ b/src/input/ipaccess.c
@@ -123,7 +123,8 @@ static int ipaccess_drop(struct osmo_fd *bfd, struct e1inp_line *line)
 	e1i_ts->pending_msg = NULL;
 
 	/* e1inp_sign_link_destroy releases the socket descriptors for us. */
-	line->ops->sign_link_down(line);
+	if (line->ops->sign_link_down)
+		line->ops->sign_link_down(line);
 
 	e1inp_line_put2(line, __func__);
 	return ret;