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| author | Anatolij Gustschin <agust@denx.de> | 2009-04-07 02:01:42 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-04-13 14:51:23 -0700 |
| commit | a8729eb302a5b5da8b0b4d29582c42648a2e0f12 (patch) | |
| tree | 88af13216c6c7ae1b7a802e65996f6a0db447a4b | |
| parent | 140bc92903287cff4545e358c1651e4b7312cbd3 (diff) | |
| download | blackbird-op-linux-a8729eb302a5b5da8b0b4d29582c42648a2e0f12.tar.gz blackbird-op-linux-a8729eb302a5b5da8b0b4d29582c42648a2e0f12.zip | |
phylib: Allow early-out in phy_change
Marvell 88E1121R Dual PHY device can be hardware-configured
to use shared interrupt pin for both PHY ports. For such
PHY configurations using shared PHY interrupt phy_interrupt()
handler will also schedule a work for PHY port which didn't
cause an interrupt.
This patch adds a possibility for PHY drivers to provide
did_interrupt() function which reports if the PHY (or a PHY
port in a multi-PHY device) generated an interrupt. This
function is called in phy_change() as phy_change() shouldn't
proceed if it is invoked for a PHY which didn't cause an
interrupt. So check for interrupt originator in phy_change()
to allow early-out.
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/phy/phy.c | 9 | ||||
| -rw-r--r-- | include/linux/phy.h | 6 |
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index 3ff1f425f1bb..e3b8932d7d74 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -655,6 +655,10 @@ static void phy_change(struct work_struct *work) struct phy_device *phydev = container_of(work, struct phy_device, phy_queue); + if (phydev->drv->did_interrupt && + !phydev->drv->did_interrupt(phydev)) + goto ignore; + err = phy_disable_interrupts(phydev); if (err) @@ -681,6 +685,11 @@ static void phy_change(struct work_struct *work) return; +ignore: + atomic_dec(&phydev->irq_disable); + enable_irq(phydev->irq); + return; + irq_enable_err: disable_irq(phydev->irq); atomic_inc(&phydev->irq_disable); diff --git a/include/linux/phy.h b/include/linux/phy.h index 32cf14a4b034..97e40cb6b588 100644 --- a/include/linux/phy.h +++ b/include/linux/phy.h @@ -388,6 +388,12 @@ struct phy_driver { /* Enables or disables interrupts */ int (*config_intr)(struct phy_device *phydev); + /* + * Checks if the PHY generated an interrupt. + * For multi-PHY devices with shared PHY interrupt pin + */ + int (*did_interrupt)(struct phy_device *phydev); + /* Clears up any memory if needed */ void (*remove)(struct phy_device *phydev); |
