net: phy: suspend phydev when going to HALTED

When phydev is going to HALTED state, we can try to suspend it to
safe more power. phy_suspend helper will check if PHY can be suspended,
so just call it when entering HALTED state.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Mugunthan V N <mugunthanvnm@ti.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index e3dd691..dea609f 100644 (file)
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -739,7 +739,7 @@ void phy_state_machine(struct work_struct *work)
        struct delayed_work *dwork = to_delayed_work(work);
        struct phy_device *phydev =
                        container_of(dwork, struct phy_device, state_queue);
-       int needs_aneg = 0;
+       int needs_aneg = 0, do_suspend = 0;
        int err = 0;
 
        mutex_lock(&phydev->lock);
@@ -854,6 +854,7 @@ void phy_state_machine(struct work_struct *work)
                                phydev->link = 0;
                                netif_carrier_off(phydev->attached_dev);
                                phydev->adjust_link(phydev->attached_dev);
+                               do_suspend = 1;
                        }
                        break;
                case PHY_RESUMING:
@@ -912,6 +913,9 @@ void phy_state_machine(struct work_struct *work)
        if (needs_aneg)
                err = phy_start_aneg(phydev);
 
+       if (do_suspend)
+               phy_suspend(phydev);
+
        if (err < 0)
                phy_error(phydev);