From b140504aa3903feaba6f6bc77a4478a944fc12d2 Mon Sep 17 00:00:00 2001 From: Steve Glendinning Date: Mon, 30 Apr 2012 07:56:54 +0000 Subject: [PATCH] smsc75xx: fix phy interrupt acknowledge smsc75xx phy interrupt acknowledge needs an mdio_write to clear PHY_INT_SRC instead of just a read like in smsc95xx. Signed-off-by: Stephane Fillod Signed-off-by: Steve Glendinning Signed-off-by: David S. Miller --- drivers/net/usb/smsc75xx.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/net/usb/smsc75xx.c b/drivers/net/usb/smsc75xx.c index cc23a589e40f..4941782358ef 100644 --- a/drivers/net/usb/smsc75xx.c +++ b/drivers/net/usb/smsc75xx.c @@ -508,9 +508,10 @@ static int smsc75xx_link_reset(struct usbnet *dev) u16 lcladv, rmtadv; int ret; - /* clear interrupt status */ + /* read and write to clear phy interrupt status */ ret = smsc75xx_mdio_read(dev->net, mii->phy_id, PHY_INT_SRC); check_warn_return(ret, "Error reading PHY_INT_SRC"); + smsc75xx_mdio_write(dev->net, mii->phy_id, PHY_INT_SRC, 0xffff); ret = smsc75xx_write_reg(dev, INT_STS, INT_STS_CLEAR_ALL); check_warn_return(ret, "Error writing INT_STS"); @@ -643,7 +644,7 @@ static int smsc75xx_set_mac_address(struct usbnet *dev) static int smsc75xx_phy_initialize(struct usbnet *dev) { - int bmcr, timeout = 0; + int bmcr, ret, timeout = 0; /* Initialize MII structure */ dev->mii.dev = dev->net; @@ -672,9 +673,10 @@ static int smsc75xx_phy_initialize(struct usbnet *dev) ADVERTISE_ALL | ADVERTISE_CSMA | ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM); - /* read to clear */ - smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC); - check_warn_return(bmcr, "Error reading PHY_INT_SRC"); + /* read and write to clear phy interrupt status */ + ret = smsc75xx_mdio_read(dev->net, dev->mii.phy_id, PHY_INT_SRC); + check_warn_return(ret, "Error reading PHY_INT_SRC"); + smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_SRC, 0xffff); smsc75xx_mdio_write(dev->net, dev->mii.phy_id, PHY_INT_MASK, PHY_INT_MASK_DEFAULT);