From: Florian Fainelli <f.fainelli@gmail.com>
Date: Thu, 5 Dec 2013 22:52:12 +0000 (-0800)
Subject: net: of_mdio: do not overwrite PHY interrupt configuration
X-Git-Tag: Ubuntu-snapdragon-4.4.0-1050.54~10975^2~595^2~4
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=7d976376560b72e187c96e4b18d059e0a0f9eba5;p=mirror_ubuntu-artful-kernel.git

net: of_mdio: do not overwrite PHY interrupt configuration

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@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c
index f93ebca0fcb7..14feffc36964 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