kernel: backport a few PHY layer fixes from upstream

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 43776

target/linux/generic/patches-3.14/072-net-phy-Check-for-aneg-completion-before-setting-sta.patch

+From: Balakumaran Kannan <kumaran.4353@gmail.com>
+Date: Thu, 24 Apr 2014 08:22:47 +0530
+Subject: [PATCH] net phy: Check for aneg completion before setting state to
+ PHY_RUNNING
+
+phy_state_machine should check whether auto-negotiatin is completed
+before changing phydev->state from PHY_NOLINK to PHY_RUNNING. If
+auto-negotiation is not completed phydev->state should be set to
+PHY_AN.
+
+Signed-off-by: Balakumaran Kannan <kumaran.4353@gmail.com>
+Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+
+--- a/drivers/net/phy/phy.c
++++ b/drivers/net/phy/phy.c
+@@ -744,6 +744,17 @@ void phy_state_machine(struct work_struc
+ 			break;
+ 
+ 		if (phydev->link) {
++			if (AUTONEG_ENABLE == phydev->autoneg) {
++				err = phy_aneg_done(phydev);
++				if (err < 0)
++					break;
++
++				if (!err) {
++					phydev->state = PHY_AN;
++					phydev->link_timeout = PHY_AN_TIMEOUT;
++					break;
++				}
++			}
+ 			phydev->state = PHY_RUNNING;
+ 			netif_carrier_on(phydev->attached_dev);
+ 			phydev->adjust_link(phydev->attached_dev);

target/linux/generic/patches-3.14/073-net-phy-resume-phydev-when-going-to-RESUMING.patch

+--- a/drivers/net/phy/phy.c
++++ b/drivers/net/phy/phy.c
+@@ -690,7 +690,7 @@ void phy_state_machine(struct work_struc
+ 	struct delayed_work *dwork = to_delayed_work(work);
+ 	struct phy_device *phydev =
+ 			container_of(dwork, struct phy_device, state_queue);
+-	int needs_aneg = 0, do_suspend = 0;
++	bool needs_aneg = false, do_suspend = false, do_resume = false;
+ 	int err = 0;
+ 
+ 	mutex_lock(&phydev->lock);
+@@ -702,7 +702,7 @@ void phy_state_machine(struct work_struc
+ 	case PHY_PENDING:
+ 		break;
+ 	case PHY_UP:
+-		needs_aneg = 1;
++		needs_aneg = true;
+ 
+ 		phydev->link_timeout = PHY_AN_TIMEOUT;
+ 
+@@ -732,7 +732,7 @@ void phy_state_machine(struct work_struc
+ 			phydev->adjust_link(phydev->attached_dev);
+ 
+ 		} else if (0 == phydev->link_timeout--) {
+-			needs_aneg = 1;
++			needs_aneg = true;
+ 			/* If we have the magic_aneg bit, we try again */
+ 			if (phydev->drv->flags & PHY_HAS_MAGICANEG)
+ 				break;
+@@ -770,7 +770,7 @@ void phy_state_machine(struct work_struc
+ 			netif_carrier_on(phydev->attached_dev);
+ 		} else {
+ 			if (0 == phydev->link_timeout--)
+-				needs_aneg = 1;
++				needs_aneg = true;
+ 		}
+ 
+ 		phydev->adjust_link(phydev->attached_dev);
+@@ -806,7 +806,7 @@ void phy_state_machine(struct work_struc
+ 			phydev->link = 0;
+ 			netif_carrier_off(phydev->attached_dev);
+ 			phydev->adjust_link(phydev->attached_dev);
+-			do_suspend = 1;
++			do_suspend = true;
+ 		}
+ 		break;
+ 	case PHY_RESUMING:
+@@ -855,6 +855,7 @@ void phy_state_machine(struct work_struc
+ 			}
+ 			phydev->adjust_link(phydev->attached_dev);
+ 		}
++		do_resume = true;
+ 		break;
+ 	}
+ 
+@@ -862,9 +863,10 @@ void phy_state_machine(struct work_struc
+ 
+ 	if (needs_aneg)
+ 		err = phy_start_aneg(phydev);
+-
+-	if (do_suspend)
++	else if (do_suspend)
+ 		phy_suspend(phydev);
++	else if (do_resume)
++		phy_resume(phydev);
+ 
+ 	if (err < 0)
+ 		phy_error(phydev);