From: Yu Watanabe <watanabe.yu+github@gmail.com>
Date: Tue, 25 Jun 2019 02:10:07 +0000 (+0900)
Subject: ethtool-util: fix returned value when ethtool_cmd_speed() is SPEED_UNKNOWN
X-Git-Tag: v243-rc1~238^2~2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d16c272844a81a3de094906698eb6256313b2bb5;p=thirdparty%2Fsystemd.git

ethtool-util: fix returned value when ethtool_cmd_speed() is SPEED_UNKNOWN
---

diff --git a/src/shared/ethtool-util.c b/src/shared/ethtool-util.c
index b2a81e4215c..49a2b3ad3d9 100644
--- a/src/shared/ethtool-util.c
+++ b/src/shared/ethtool-util.c
@@ -186,8 +186,13 @@ int ethtool_get_link_info(int *fd, const char *ifname,
         if (ret_autonegotiation)
                 *ret_autonegotiation = ecmd.autoneg;
 
-        if (ret_speed)
-                *ret_speed = ethtool_cmd_speed(&ecmd) * 1000 * 1000;
+        if (ret_speed) {
+                uint32_t speed;
+
+                speed = ethtool_cmd_speed(&ecmd);
+                *ret_speed = speed == (uint32_t) SPEED_UNKNOWN ?
+                        SIZE_MAX : (size_t) speed * 1000 * 1000;
+        }
 
         if (ret_duplex)
                 *ret_duplex = ecmd.duplex;