On Mon, 27 Dec 2021 18:02:33 +0800 Joseph CHAMG wrote:

+static inline void dm9051_phyup_lock(struct board_info *db)
+{
+	int val, ret;
+
+	mutex_lock(&db->addr_lock);
+
+	ret = dm9051_phy_read(db, MII_BMCR, &val);
+	if (ret)
+		return;
+
+	/* BMCR Power-up PHY */
+	ret = dm9051_phy_write(db, MII_BMCR, val & ~0x0800);
+	if (ret)
+		return;
+
+	/* GPR Power-up PHY */
+	dm9051_iow(db, DM9051_GPR, 0);
+	mdelay(1); /* need for activate phyxcer */
+
+	mutex_unlock(&db->addr_lock);
+}
+
+static inline void dm9051_phydown_lock(struct board_info *db)
+{
+	mutex_lock(&db->addr_lock);
+	dm9051_iow(db, DM9051_GPR, 0x01); /* Power-Down PHY */
+	mutex_unlock(&db->addr_lock);
+}

Please remove the 'inline' qualifier from functions in C sources.
Compiler will know which static functions to inline these days.