1 files changed, 6 insertions, 12 deletions

diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 8a10d5b3c832..ceaca7c134a0 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -531,6 +531,7 @@ static int prb_calc_retire_blk_tmo(struct packet_sock *po,
         unsigned int mbits = 0, msec = 0, div = 0, tmo = 0;
         struct ethtool_cmd ecmd;
         int err;
+        u32 speed;
 
         rtnl_lock();
         dev = __dev_get_by_index(sock_net(&po->sk), po->ifindex);
@@ -539,25 +540,18 @@ static int prb_calc_retire_blk_tmo(struct packet_sock *po,
                 return DEFAULT_PRB_RETIRE_TOV;
         }
         err = __ethtool_get_settings(dev, &ecmd);
+        speed = ethtool_cmd_speed(&ecmd);
         rtnl_unlock();
         if (!err) {
-                switch (ecmd.speed) {
-                case SPEED_10000:
-                        msec = 1;
-                        div = 10000/1000;
-                        break;
-                case SPEED_1000:
-                        msec = 1;
-                        div = 1000/1000;
-                        break;
                 /*
                  * If the link speed is so slow you don't really
                  * need to worry about perf anyways
                  */
-                case SPEED_100:
-                case SPEED_10:
-                default:
+                if (speed < SPEED_1000 || speed == SPEED_UNKNOWN) {
                         return DEFAULT_PRB_RETIRE_TOV;
+                } else {
+                        msec = 1;
+                        div = speed / 1000;
                 }
         }