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authorSteve Glendinning <steve.glendinning@shawell.net>2012-04-30 09:56:54 +0200
committerDavid S. Miller <davem@davemloft.net>2012-05-01 03:52:41 +0200
commitb140504aa3903feaba6f6bc77a4478a944fc12d2 (patch)
treee086cd76eafc0aaedb1a17fcf2476c478206f05f /drivers/net
parentsmsc75xx: fix phy init reset loop (diff)
downloadlinux-b140504aa3903feaba6f6bc77a4478a944fc12d2.tar.xz
linux-b140504aa3903feaba6f6bc77a4478a944fc12d2.zip
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 <fillods@users.sf.net> Signed-off-by: Steve Glendinning <steve.glendinning@shawell.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/usb/smsc75xx.c12
1 files 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);