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

iabdalkader · dpgeorge · commit 66115a374443 · 2021-06-13T12:29:11.000+10:00
Fixes #7346.
diff --git 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
         }
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -791,11 +791,10 @@ int eth_link_status(eth_t *self) {`
`791`	`791`	`return 2; // link no-ip;`
`792`	`792`	`}`
`793`	`793`	`} else {`
`794`		`- int s = eth_phy_read(0) \| eth_phy_read(0x10) << 16;`
`795`		`- if (s == 0) {`
`796`		`- return 0; // link down`
	`794`	`+ if (eth_phy_read(PHY_BSR) & PHY_BSR_LINK_STATUS) {`
	`795`	`+ return 1; // link up`
`797`	`796`	`} else {`
`798`		`- return 1; // link join`
	`797`	`+ return 0; // link down`
`799`	`798`	`}`
`800`	`799`	`}`
`801`	`800`	`}`