diff options
| -rw-r--r-- | drivers/net/phy/phy.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 3af9fcf76c8..95f0419ba21 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -7,6 +7,7 @@ * Author: Andy Fleming * * Copyright (c) 2004 Freescale Semiconductor, Inc. + * Copyright (c) 2006 Maciej W. Rozycki * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the @@ -32,6 +33,8 @@ #include <linux/mii.h> #include <linux/ethtool.h> #include <linux/phy.h> +#include <linux/timer.h> +#include <linux/workqueue.h> #include <asm/io.h> #include <asm/irq.h> @@ -484,6 +487,9 @@ static irqreturn_t phy_interrupt(int irq, void *phy_dat) { struct phy_device *phydev = phy_dat; + if (PHY_HALTED == phydev->state) + return IRQ_NONE; /* It can't be ours. */ + /* The MDIO bus is not allowed to be written in interrupt * context, so we need to disable the irq here. A work * queue will write the PHY to disable and clear the @@ -577,6 +583,13 @@ int phy_stop_interrupts(struct phy_device *phydev) if (err) phy_error(phydev); + /* + * Finish any pending work; we might have been scheduled + * to be called from keventd ourselves, though. + */ + if (!current_is_keventd()) + flush_scheduled_work(); + free_irq(phydev->irq, phydev); return err; @@ -603,7 +616,8 @@ static void phy_change(void *data) enable_irq(phydev->irq); /* Reenable interrupts */ - err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); + if (PHY_HALTED != phydev->state) + err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); if (err) goto irq_enable_err; @@ -624,18 +638,24 @@ void phy_stop(struct phy_device *phydev) if (PHY_HALTED == phydev->state) goto out_unlock; - if (phydev->irq != PHY_POLL) { - /* Clear any pending interrupts */ - phy_clear_interrupt(phydev); + phydev->state = PHY_HALTED; + if (phydev->irq != PHY_POLL) { /* Disable PHY Interrupts */ phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); - } - phydev->state = PHY_HALTED; + /* Clear any pending interrupts */ + phy_clear_interrupt(phydev); + } out_unlock: spin_unlock(&phydev->lock); + + /* + * Cannot call flush_scheduled_work() here as desired because + * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change() + * will not reenable interrupts. + */ } |