From 959bf8a245016220c1d9ece011d25505f724cd2a Mon Sep 17 00:00:00 2001
From: Astro <astro@spaceboyz.net>
Date: Mon, 11 Nov 2019 00:08:05 +0100
Subject: [PATCH] zynq::eth: don't check_link_change if link already
 established

---
 src/zynq/eth/mod.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/zynq/eth/mod.rs b/src/zynq/eth/mod.rs
index a4a5940..4ab6071 100644
--- a/src/zynq/eth/mod.rs
+++ b/src/zynq/eth/mod.rs
@@ -507,6 +507,12 @@ impl<'r> EthInner<'r> {
 
 
     fn check_link_change(&mut self, phy: &Phy) {
+        // As the PHY access takes some time, exit early if there was
+        // already a link. TODO: check once per second.
+        if self.link.is_some() {
+            return
+        }
+
         let link = phy.get_link(self);
 
         // Check link state transition