--- zzzz-none-000/linux-4.9.279/drivers/net/bonding/bond_sysfs.c	2021-08-08 06:38:54.000000000 +0000
+++ puma7-atom-6591-750/linux-4.9.279/drivers/net/bonding/bond_sysfs.c	2023-02-08 11:43:42.000000000 +0000
@@ -813,3 +813,106 @@
 	bond->dev->sysfs_groups[0] = &bonding_group;
 }
 
+/* sysfs handlers */
+ssize_t bonding_show_man_linkprop(struct device *dev, struct device_attribute *attr,
+		char *buf)
+{
+	struct slave * slave;
+
+	slave = container_of(attr, struct slave, man_linkprop);
+
+	return scnprintf(buf, (ssize_t)PAGE_SIZE, "%d %d %d\n", slave->man_link, slave->man_speed, slave->man_duplex);
+}
+
+ssize_t bonding_store_man_linkprop(struct device *dev, struct device_attribute *attr,
+		 const char *buf, size_t count)
+{
+	struct slave * slave;
+    int man_link;
+    int man_speed;
+    int man_duplex;
+    int link_changed;
+    int link_prev;
+    int prev_speed;
+    int prev_duplex;
+
+	slave = container_of(attr, struct slave, man_linkprop);
+
+	sscanf(buf,"%d %d %d", &man_link, &man_speed, &man_duplex);
+
+	link_prev = slave->man_link;
+	prev_speed = slave->man_duplex;
+	prev_duplex = man_duplex;
+	link_changed = (prev_speed != man_speed) || (prev_duplex != man_duplex);
+
+	slave->man_link   = man_link;
+	slave->man_speed  = man_speed;
+	slave->man_duplex = man_duplex;
+
+	switch(man_link) {
+	case 1:
+		switch (link_prev) {
+		case 1: /* UP->UP */
+			if (link_changed) {
+				bond_slave_netdev_event(NETDEV_CHANGE, slave->dev);
+			}
+			break;
+
+		case -1: /* AUTODETECT->UP */
+			bond_slave_netdev_event(NETDEV_UP, slave->dev);
+			break;
+
+		case 0:  /* DOWN->UP */
+			bond_slave_netdev_event(NETDEV_UP, slave->dev);
+			break;
+
+		default:
+			/* kernel overrun */
+			break;
+		}
+		break;
+
+	case 0: /* ANY->DOWN */
+		if (link_prev != 0) {
+			bond_slave_netdev_event(NETDEV_DOWN, slave->dev);
+		}
+		break;
+
+	case -1:
+		switch (link_prev) {
+		case 1: /* UP->AUTODETECT */
+			if (bond_slave_is_up(slave)) {
+				bond_slave_netdev_event(NETDEV_CHANGE, slave->dev);
+			}
+			else
+			{
+				bond_slave_netdev_event(NETDEV_DOWN, slave->dev);
+			}
+			break;
+
+		case 0: /* DOWN->AUTODETECT */
+			if (bond_slave_is_up(slave)) {
+				bond_slave_netdev_event(NETDEV_UP, slave->dev);
+			}
+			break;
+
+		case -1: /* AUTODETECT->AUTODETECT */
+			break; /* nothing to do */
+
+		default:
+			/* kernel overrun */
+			break;
+		}
+		break;
+
+	default:
+		/* illegal value. recover previous values */
+		slave->man_link = link_prev;
+		slave->man_speed  = prev_speed;
+		slave->man_duplex = prev_duplex;
+		break;
+
+	}
+	return count;
+}
+