[PATCH 4.4 158/312] drivers: net: cpsw: dont ignore phy-mode if phy-handle is used

[Greg Kroah-Hartman]

From: David Rivshin <drivshin@xxxxxxxxxxx>

commit ae092b5bded24d5dc7dae0e0aef4669c169ce874 upstream.

The phy-mode emac property was only being processed in the phy_id
or fixed-link cases. However if phy-handle was specified instead,
an error message would complain about the lack of phy_id or
fixed-link, and then jump past the of_get_phy_mode(). This would
result in the PHY mode defaulting to MII, regardless of what the
devicetree specified.

Fixes: 9e42f715264f ("drivers: net: cpsw: add phy-handle parsing")
Signed-off-by: David Rivshin <drivshin@xxxxxxxxxxx>
Tested-by: Nicolas Chauvet <kwizart@xxxxxxxxx>
Tested-by: Andrew Goodbody <andrew.goodbody@xxxxxxxxxxxxxx>
Reviewed-by: Mugunthan V N <mugunthanvnm@xxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/net/ethernet/ti/cpsw.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -2060,7 +2060,11 @@ static int cpsw_probe_dt(struct cpsw_pla
 		slave_data->phy_node = of_parse_phandle(slave_node,
 							"phy-handle", 0);
 		parp = of_get_property(slave_node, "phy_id", &lenp);
-		if (of_phy_is_fixed_link(slave_node)) {
+		if (slave_data->phy_node) {
+			dev_dbg(&pdev->dev,
+				"slave[%d] using phy-handle=\"%s\"\n",
+				i, slave_data->phy_node->full_name);
+		} else if (of_phy_is_fixed_link(slave_node)) {
 			struct device_node *phy_node;
 			struct phy_device *phy_dev;
 
@@ -2097,7 +2101,9 @@ static int cpsw_probe_dt(struct cpsw_pla
 				 PHY_ID_FMT, mdio->name, phyid);
 			put_device(&mdio->dev);
 		} else {
-			dev_err(&pdev->dev, "No slave[%d] phy_id or fixed-link property\n", i);
+			dev_err(&pdev->dev,
+				"No slave[%d] phy_id, phy-handle, or fixed-link property\n",
+				i);
 			goto no_phy_slave;
 		}
 		slave_data->phy_if = of_get_phy_mode(slave_node);