stm32/eth: Fix eth_link_status function to use correct BSR bit.

Fixes #7346.

1 files changed, 3 insertions, 4 deletions

diff --git a/ports/stm32/eth.c b/ports/stm32/eth.c
index 30f8a1014..79165e119 100644
--- a/ports/stm32/eth.c
+++ b/ports/stm32/eth.c
@@ -791,11 +791,10 @@ int eth_link_status(eth_t *self) {
             return 2; // link no-ip;
         }
     } else {
-        int s = eth_phy_read(0) | eth_phy_read(0x10) << 16;
-        if (s == 0) {
-            return 0; // link down
+        if (eth_phy_read(PHY_BSR) & PHY_BSR_LINK_STATUS) {
+            return 1; // link up
         } else {
-            return 1; // link join
+            return 0; // link down
         }
     }
 }