[PATCH net-next] net: phy: Use interrupts when available in NOLINK state

[PATCH net-next] net: phy: Use interrupts when available in NOLINK state

[Andrew Lunn]

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 <andrew@lunn.ch>
---
 drivers/net/phy/phy.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c
index adb48abafc87..48ce6ef400fe 100644
--- 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;
-- 
2.6.2

Re: [PATCH net-next] net: phy: Use interrupts when available in NOLINK state

[David Miller]

From: Andrew Lunn <andrew@lunn.ch>
Date: Mon, 16 Nov 2015 23:36:46 +0100

> 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 <andrew@lunn.ch>

Applied.