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 <[email protected]> Acked-by: Mugunthan V N <[email protected]> Reviewed-by: Florian Fainelli <[email protected]> Signed-off-by: David S. Miller <[email protected]>
torvalds · Dec 17, 2013 · be9dad1 · be9dad1
1 parent 1211ce5
commit be9dad1
Showing 1 changed file with 5 additions and 1 deletion.
diff --git 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);