net: phy: Use interrupts when available in NOLINK state

The NOLINK state will poll the phy once a second to see if the link
has come up. If the phy has an interrupt line, this polling can be
skipped, since the phy should interrupt when the link returns.

Signed-off-by: Andrew Lunn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index adb48abafc872a71e801b5505d676f9db02c7466..48ce6ef400fe7fdda6ae78a9a22943b2307c1c8b 100644 (file)
--- a/drivers/net/phy/phy.c
+++ b/drivers/net/phy/phy.c
@@ -863,6 +863,9 @@ void phy_state_machine(struct work_struct *work)
                        needs_aneg = true;
                break;
        case PHY_NOLINK:
+               if (phy_interrupt_is_valid(phydev))
+                       break;
+
                err = phy_read_status(phydev);
                if (err)
                        break;