From 20274ab86ac234e4d1f216257f660ba0c0e3841e Mon Sep 17 00:00:00 2001
From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Wed, 6 Oct 2021 21:44:02 +0900
Subject: [PATCH] ethtool-util: do not try to enable unsupported WoL options

---
 src/shared/ethtool-util.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/shared/ethtool-util.c b/src/shared/ethtool-util.c
index 0b5f64c1a3..618ec8d2c3 100644
--- a/src/shared/ethtool-util.c
+++ b/src/shared/ethtool-util.c
@@ -425,6 +425,16 @@ int ethtool_set_wol(int *ethtool_fd, const char *ifname, uint32_t wolopts) {
         if (ioctl(*ethtool_fd, SIOCETHTOOL, &ifr) < 0)
                 return -errno;
 
+        if ((wolopts & ~ecmd.supported) != 0) {
+                _cleanup_free_ char *str = NULL;
+
+                (void) wol_options_to_string_alloc(wolopts & ~ecmd.supported, &str);
+                log_debug("Network interface %s does not support requested Wake on LAN option(s) \"%s\", ignoring.",
+                          ifname, strna(str));
+
+                wolopts &= ecmd.supported;
+        }
+
         UPDATE(ecmd.wolopts, wolopts, need_update);
 
         if (!need_update)