Merge branch 'thunderx-mdio-fixes'

David Daney says:

====================
net/phy: Fixes for Cavium Thunder MDIO code.

Previous patch set:
commit 5fc7cf1794 ("net: thunderx: Cleanup PHY probing code.")
commit 1eefee901f ("phy: mdio-octeon: Refactor into two files/modules")
commit 379d7ac7ca ("phy: mdio-thunder: Add driver for Cavium Thunder SoC MDIO buses.")

Had several problems.  We try to fix them here.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cavium/Kconfig

@@ -35,7 +35,7 @@ config	THUNDER_NIC_BGX
 	tristate "Thunder MAC interface driver (BGX)"
 	depends on 64BIT
 	select PHYLIB
-	select MDIO_OCTEON
+	select MDIO_THUNDER
 	---help---
 	  This driver supports programming and controlling of MAC
 	  interface from NIC physical function driver.

drivers/net/ethernet/cavium/thunder/thunder_bgx.c

@@ -974,17 +974,18 @@ static int bgx_init_acpi_phy(struct bgx *bgx)
 static int bgx_init_of_phy(struct bgx *bgx)
 {
 	struct fwnode_handle *fwn;
+	struct device_node *node = NULL;
 	u8 lmac = 0;
-	const char *mac;
 
 	device_for_each_child_node(&bgx->pdev->dev, fwn) {
 		struct phy_device *pd;
 		struct device_node *phy_np;
-		struct device_node *node = to_of_node(fwn);
+		const char *mac;
 
 		/* Should always be an OF node.  But if it is not, we
 		 * cannot handle it, so exit the loop.
 		 */
+		node = to_of_node(fwn);
 		if (!node)
 			break;
 
@@ -1005,17 +1006,30 @@ static int bgx_init_of_phy(struct bgx *bgx)
 			/* Wait until the phy drivers are available */
 			pd = of_phy_find_device(phy_np);
 			if (!pd)
-				return -EPROBE_DEFER;
+				goto defer;
 			bgx->lmac[lmac].phydev = pd;
 		}
 
 		lmac++;
-		if (lmac == MAX_LMAC_PER_BGX) {
-			of_node_put(node);
+		if (lmac == MAX_LMAC_PER_BGX)
 			break;
-		}
 	}
+	of_node_put(node);
 	return 0;
+
+defer:
+	/* We are bailing out, try not to leak device reference counts
+	 * for phy devices we may have already found.
+	 */
+	while (lmac) {
+		if (bgx->lmac[lmac].phydev) {
+			put_device(&bgx->lmac[lmac].phydev->mdio.dev);
+			bgx->lmac[lmac].phydev = NULL;
+		}
+		lmac--;
+	}
+	of_node_put(node);
+	return -EPROBE_DEFER;
 }
 
 #else

drivers/net/phy/mdio-cavium.c

@@ -147,3 +147,7 @@ int cavium_mdiobus_write(struct mii_bus *bus, int phy_id, int regnum, u16 val)
 	return 0;
 }
 EXPORT_SYMBOL(cavium_mdiobus_write);
+
+MODULE_DESCRIPTION("Common code for OCTEON and Thunder MDIO bus drivers");
+MODULE_AUTHOR("David Daney");
+MODULE_LICENSE("GPL");