diff --git a/target/linux/realtek/files-6.18/drivers/net/pcs/pcs-rtl-otto.c b/target/linux/realtek/files-6.18/drivers/net/pcs/pcs-rtl-otto.c
index a7bfb6cfc9..507bb1bbe1 100644
--- a/target/linux/realtek/files-6.18/drivers/net/pcs/pcs-rtl-otto.c
+++ b/target/linux/realtek/files-6.18/drivers/net/pcs/pcs-rtl-otto.c
@@ -221,6 +221,7 @@ struct rtpcs_serdes {
 		struct regmap_field *usxgmii_submode;	/* nullable, 93xx only */
 	} swcore_regs;
 	struct rtpcs_link *link[RTPCS_MAX_LINKS_PER_SDS];
+	s16 link_port[RTPCS_MAX_LINKS_PER_SDS];
 
 	enum rtpcs_sds_mode hw_mode;
 	u8 id;
@@ -4308,6 +4309,8 @@ static int rtpcs_probe(struct platform_device *pdev)
 		sds->id = i;
 		sds->ops = ctrl->cfg->sds_ops;
 		sds->regs = ctrl->cfg->sds_regs;
+		for (int j = 0; j < RTPCS_MAX_LINKS_PER_SDS; j++)
+			sds->link_port[j] = -1;
 
 		ret = ctrl->cfg->sds_probe(sds);
 		if (ret)