Release version 5.12.

Signed-off-by: Michal Kubecek <mkubecek@suse.cz>
diff --git a/NEWS b/NEWS
index c43fed7..4e8b25c 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,9 @@
+Version 5.12 - May 2, 2021
+	* Feature: support lanes count (no option and -s)
+	* Fix: fix help message for master-slave parameter (-s)
+	* Fix: better error message for master-slave in ioctl code path
+	* Fix: get rid of compiler warnings in "make check"
+
 Version 5.10 - Dec 16, 2020
 	* Feature: infrastructure for JSON output
 	* Feature: separate FLAGS in -h output
diff --git a/configure.ac b/configure.ac
index 13c2bc0..730576b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
-AC_INIT(ethtool, 5.10, netdev@vger.kernel.org)
+AC_INIT(ethtool, 5.12, netdev@vger.kernel.org)
 AC_PREREQ(2.52)
 AC_CONFIG_SRCDIR([ethtool.c])
 AM_INIT_AUTOMAKE([gnu subdir-objects])
diff --git a/ethtool.8.in b/ethtool.8.in
index fe49b66..67fb325 100644
--- a/ethtool.8.in
+++ b/ethtool.8.in
@@ -117,7 +117,7 @@
 .  hy \\n(HY
 ..
 .
-.TH ETHTOOL 8 "Dec 2020" "Ethtool version @VERSION@"
+.TH ETHTOOL 8 "May 2021" "Ethtool version @VERSION@"
 .SH NAME
 ethtool \- query or control network driver and hardware settings
 .