Hi,
This patch is not marked for 4.4-stable, but it's already in 4.9 and 4.14 stable.
Please apply to 4.4-stable.
This patch fixed parsing of phy-handle DT property in dual_emac config.
--
SZ Lin (林上智)
>From 2123cdb99d4b7528fb0aa504ac873b66e386a243 Mon Sep 17 00:00:00 2001
From: David Rivshin <drivshin@xxxxxxxxxxx>
Date: Wed, 27 Apr 2016 21:25:25 -0400
Subject: [PATCH] drivers: net: cpsw: fix parsing of phy-handle DT property in
dual_emac config
commit 552165bcf7060b998b4a9b5b86110b6a5e04dfd9 upstream
Commit 9e42f715264ff158478fa30eaed847f6e131366b ("drivers: net: cpsw: add
phy-handle parsing") saved the "phy-handle" phandle into a new cpsw_priv
field. However, phy connections are per-slave, so the phy_node field should
be in cpsw_slave_data rather than cpsw_priv.
This would go unnoticed in a single emac configuration. But in dual_emac
mode, the last "phy-handle" property parsed for either slave would be used
by both of them, causing them both to refer to the same phy_device.
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>
Reviewed-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: SZ Lin (林上智) <sz.lin@xxxxxxxx>
---
drivers/net/ethernet/ti/cpsw.c | 13 ++++++-------
drivers/net/ethernet/ti/cpsw.h | 1 +
2 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index c69b0bdd891d..c21c80a228d9 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -371,7 +371,6 @@ struct cpsw_priv {
spinlock_t lock;
struct platform_device *pdev;
struct net_device *ndev;
- struct device_node *phy_node;
struct napi_struct napi_rx;
struct napi_struct napi_tx;
struct device *dev;
@@ -1165,8 +1164,8 @@ static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
cpsw_ale_add_mcast(priv->ale, priv->ndev->broadcast,
1 << slave_port, 0, 0, ALE_MCAST_FWD_2);
- if (priv->phy_node)
- slave->phy = of_phy_connect(priv->ndev, priv->phy_node,
+ if (slave->data->phy_node)
+ slave->phy = of_phy_connect(priv->ndev, slave->data->phy_node,
&cpsw_adjust_link, 0, slave->data->phy_if);
else
slave->phy = phy_connect(priv->ndev, slave->data->phy_id,
@@ -1957,12 +1956,11 @@ static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
slave->port_vlan = data->dual_emac_res_vlan;
}
-static int cpsw_probe_dt(struct cpsw_priv *priv,
+static int cpsw_probe_dt(struct cpsw_platform_data *data,
struct platform_device *pdev)
{
struct device_node *node = pdev->dev.of_node;
struct device_node *slave_node;
- struct cpsw_platform_data *data = &priv->data;
int i = 0, ret;
u32 prop;
@@ -2050,7 +2048,8 @@ static int cpsw_probe_dt(struct cpsw_priv *priv,
if (strcmp(slave_node->name, "slave"))
continue;
- priv->phy_node = of_parse_phandle(slave_node, "phy-handle", 0);
+ 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)) {
struct device_node *phy_node;
@@ -2291,7 +2290,7 @@ static int cpsw_probe(struct platform_device *pdev)
/* Select default pin state */
pinctrl_pm_select_default_state(&pdev->dev);
- if (cpsw_probe_dt(priv, pdev)) {
+ if (cpsw_probe_dt(&priv->data, pdev)) {
dev_err(&pdev->dev, "cpsw: platform data missing\n");
ret = -ENODEV;
goto clean_runtime_disable_ret;
diff --git a/drivers/net/ethernet/ti/cpsw.h b/drivers/net/ethernet/ti/cpsw.h
index 442a7038e660..e50afd1b2eda 100644
--- a/drivers/net/ethernet/ti/cpsw.h
+++ b/drivers/net/ethernet/ti/cpsw.h
@@ -18,6 +18,7 @@
#include <linux/phy.h>
struct cpsw_slave_data {
+ struct device_node *phy_node;
char phy_id[MII_BUS_ID_SIZE];
int phy_if;
u8 mac_addr[ETH_ALEN];
--
2.19.0
