net: dsa: microchip: get port link status

Get port link status to know whether to read MIB counters when the link
is going down.

Signed-off-by: Tristram Ha <Tristram.Ha@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/dsa/microchip/ksz9477.c b/drivers/net/dsa/microchip/ksz9477.c
index 94cd385..1b8267c 100644 (file)
--- a/drivers/net/dsa/microchip/ksz9477.c
+++ b/drivers/net/dsa/microchip/ksz9477.c
@@ -1196,6 +1196,7 @@ static const struct dsa_switch_ops ksz9477_switch_ops = {
        .setup                  = ksz9477_setup,
        .phy_read               = ksz9477_phy_read16,
        .phy_write              = ksz9477_phy_write16,
+       .adjust_link            = ksz_adjust_link,
        .port_enable            = ksz_enable_port,
        .port_disable           = ksz_disable_port,
        .get_strings            = ksz9477_get_strings,

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index eecfbf3..0589fc7 100644 (file)
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -140,6 +140,20 @@ int ksz_phy_write16(struct dsa_switch *ds, int addr, int reg, u16 val)
 }
 EXPORT_SYMBOL_GPL(ksz_phy_write16);
 
+void ksz_adjust_link(struct dsa_switch *ds, int port,
+                    struct phy_device *phydev)
+{
+       struct ksz_device *dev = ds->priv;
+       struct ksz_port *p = &dev->ports[port];
+
+       /* Read all MIB counters when the link is going down. */
+       if (!phydev->link) {
+               p->read = true;
+               schedule_work(&dev->mib_read);
+       }
+}
+EXPORT_SYMBOL_GPL(ksz_adjust_link);
+
 int ksz_sset_count(struct dsa_switch *ds, int port, int sset)
 {
        struct ksz_device *dev = ds->priv;

diff --git a/drivers/net/dsa/microchip/ksz_common.h b/drivers/net/dsa/microchip/ksz_common.h
index f45a553..eb29bb0 100644 (file)
--- a/drivers/net/dsa/microchip/ksz_common.h
+++ b/drivers/net/dsa/microchip/ksz_common.h
@@ -14,6 +14,8 @@ void ksz_init_mib_timer(struct ksz_device *dev);
 
 int ksz_phy_read16(struct dsa_switch *ds, int addr, int reg);
 int ksz_phy_write16(struct dsa_switch *ds, int addr, int reg, u16 val);
+void ksz_adjust_link(struct dsa_switch *ds, int port,
+                    struct phy_device *phydev);
 int ksz_sset_count(struct dsa_switch *ds, int port, int sset);
 void ksz_get_ethtool_stats(struct dsa_switch *ds, int port, uint64_t *buf);
 int ksz_port_bridge_join(struct dsa_switch *ds, int port,