From fdea03b40859057fb85014ace8cdb65e57c2b373 Mon Sep 17 00:00:00 2001
From: Alexander Couzens <lynxis@fe80.eu>
Date: Tue, 29 Dec 2020 23:13:23 +0100
Subject: gprs_ns2: fr: check the device state before changing state

Reduce the required capabilities if the device is already
set up.

Change-Id: I72eb2567078758694c648a493324b212461ee735
---
 src/gb/gprs_ns2_fr.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/gb/gprs_ns2_fr.c b/src/gb/gprs_ns2_fr.c
index 1b0ec003..e972a343 100644
--- a/src/gb/gprs_ns2_fr.c
+++ b/src/gb/gprs_ns2_fr.c
@@ -447,6 +447,13 @@ static int set_ifupdown(const char *netif, bool up)
 	memset(&req, 0, sizeof req);
 	OSMO_STRLCPY_ARRAY(req.ifr_name, netif);
 
+	rc = ioctl(sock, SIOCGIFFLAGS, &req);
+	if (rc < 0)
+		return rc;
+
+	if ((req.ifr_flags & IFF_UP) == up)
+		return 0;
+
 	if (up)
 		req.ifr_flags |= IFF_UP;
 
-- 
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