X-Git-Url: http://git.monstr.eu/?a=blobdiff_plain;f=drivers%2Fnet%2Fphy%2Fphy_device.c;h=46acddd865a782f550bf11536a67010b4485d5dc;hb=690685ffcdcec3975f45eafe3dcf4bff29aa1676;hp=431a8719c6359b24029c8964405ab165b21edde6;hpb=8171acb8bc9b33f3ed827f0615b24f7a06495cd0;p=linux-2.6-microblaze.git

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 431a8719c635..46acddd865a7 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -278,6 +278,15 @@ static __maybe_unused int mdio_bus_phy_suspend(struct device *dev)
 	if (phydev->mac_managed_pm)
 		return 0;
 
+	/* Wakeup interrupts may occur during the system sleep transition when
+	 * the PHY is inaccessible. Set flag to postpone handling until the PHY
+	 * has resumed. Wait for concurrent interrupt handler to complete.
+	 */
+	if (phy_interrupt_is_valid(phydev)) {
+		phydev->irq_suspended = 1;
+		synchronize_irq(phydev->irq);
+	}
+
 	/* We must stop the state machine manually, otherwise it stops out of
 	 * control, possibly with the phydev->lock held. Upon resume, netdev
 	 * may call phy routines that try to grab the same lock, and that may
@@ -315,6 +324,20 @@ static __maybe_unused int mdio_bus_phy_resume(struct device *dev)
 	if (ret < 0)
 		return ret;
 no_resume:
+	if (phy_interrupt_is_valid(phydev)) {
+		phydev->irq_suspended = 0;
+		synchronize_irq(phydev->irq);
+
+		/* Rerun interrupts which were postponed by phy_interrupt()
+		 * because they occurred during the system sleep transition.
+		 */
+		if (phydev->irq_rerun) {
+			phydev->irq_rerun = 0;
+			enable_irq(phydev->irq);
+			irq_wake_thread(phydev->irq, phydev);
+		}
+	}
+
 	if (phydev->attached_dev && phydev->adjust_link)
 		phy_start_machine(phydev);