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

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Date:	Mon, 16 Nov 2015 23:36:46 +0100
From:	Andrew Lunn <andrew@...n.ch>
To:	David Miller <davem@...emloft.net>
Cc:	Florian Fainelli <f.fainelli@...il.com>,
	netdev <netdev@...r.kernel.org>, Andrew Lunn <andrew@...n.ch>
Subject: [PATCH net-next] 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 <andrew@...n.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

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