net sysfs: Print link speed as signed integer

Otherwise 4294967295 (MBit/s) (-1) will be printed when there is no link.
Documentation/ABI/testing/sysfs-class-net does not state if this shall be
signed or unsigned.
Also remove the now unused variable fmt_udec.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 2 deletions

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 805a95a48107..830f8a7c1cb1 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -31,7 +31,6 @@
 static const char fmt_hex[] = "%#x\n";
 static const char fmt_long_hex[] = "%#lx\n";
 static const char fmt_dec[] = "%d\n";
-static const char fmt_udec[] = "%u\n";
 static const char fmt_ulong[] = "%lu\n";
 static const char fmt_u64[] = "%llu\n";
 
@@ -202,7 +201,7 @@ static ssize_t speed_show(struct device *dev,
         if (netif_running(netdev)) {
                 struct ethtool_cmd cmd;
                 if (!__ethtool_get_settings(netdev, &cmd))
-                        ret = sprintf(buf, fmt_udec, ethtool_cmd_speed(&cmd));
+                        ret = sprintf(buf, fmt_dec, ethtool_cmd_speed(&cmd));
         }
         rtnl_unlock();
         return ret;