network/ifup.sh: Don't try to modprobe ipv6, if already available

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>
[Edited-by: Harald Hoyer]
Simplified logic.

(cherry picked from commit 28f3f537c4ffb101c26def41c9a6a0278f9b4437)

diff --git a/modules.d/40network/ifup.sh b/modules.d/40network/ifup.sh
index fd84e4cd0ff39142699d541549adbe9c25d8b4e5..79127f248d9b33620486204bfadcca8ad971e52a 100755 (executable)
--- a/modules.d/40network/ifup.sh
+++ b/modules.d/40network/ifup.sh
@@ -106,6 +106,7 @@ do_dhcp() {
 }
 
 load_ipv6() {
+    [ -d /proc/sys/net/ipv6 ] && return
     modprobe ipv6
     i=0
     while [ ! -d /proc/sys/net/ipv6 ]; do