netdev - [PATCH 3/7] net: of_mdio: do not overwrite PHY interrupt configuration

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Date:	Thu, 5 Dec 2013 14:52:12 -0800
From:	Florian Fainelli <florian@...nwrt.org>
To:	<netdev@...r.kernel.org>
CC:	<davem@...emloft.net>, <grant.likely@...aro.org>,
	<devicetree@...r.kernel.org>, <abrodkin@...opsys.com>,
	<rob.herring@...xeda.com>, <mark.rutland@....com>,
	<sebastian.hesselbarth@...il.com>,
	Florian Fainelli <f.fainelli@...il.com>
Subject: [PATCH 3/7] net: of_mdio: do not overwrite PHY interrupt configuration

From: Florian Fainelli <f.fainelli@...il.com>

If irq_of_parse_and_map fails to find an interrupt line for a given PHY,
we will force the PHY interrupt to be PHY_POLL, completely overriding
the previous value that the MDIO bus may have set for us (e.g:
PHY_IGNORE_INTERRUPT). In case of failure, just restore the previous
value.

Signed-off-by: Florian Fainelli <f.fainelli@...il.com>
---
 drivers/of/of_mdio.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index f93ebca..4923ab2 100644
--- a/drivers/of/of_mdio.c
+++ b/drivers/of/of_mdio.c
@@ -27,7 +27,7 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *chi
 {
 	struct phy_device *phy;
 	bool is_c45;
-	int rc;
+	int rc, prev_irq;
 
 	is_c45 = of_device_is_compatible(child,
 					 "ethernet-phy-ieee802.3-c45");
@@ -37,10 +37,11 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio, struct device_node *chi
 		return 1;
 
 	if (mdio->irq) {
+		prev_irq= mdio->irq[addr];
 		mdio->irq[addr] =
 			irq_of_parse_and_map(child, 0);
 		if (!mdio->irq[addr])
-			mdio->irq[addr] = PHY_POLL;
+			mdio->irq[addr] = prev_irq;
 	}
 
 	/* Associate the OF node with the device structure so it
-- 
1.8.3.2

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