@@ -871,9 +871,8 @@ void phy_state_machine(struct work_struc
case PHY_RUNNING:
/* Only register a CHANGE if we are
* polling */
- if (PHY_POLL == phydev->irq)
- phydev->state = PHY_CHANGELINK;
- break;
+ if (PHY_POLL != phydev->irq)
+ break;
case PHY_CHANGELINK:
err = phy_read_status(phydev);
@@ -161,7 +161,7 @@ struct phy_device* phy_device_create(str
dev->speed = 0;
dev->duplex = -1;
dev->pause = dev->asym_pause = 0;
- dev->link = 1;
+ dev->link = 0;
dev->interface = PHY_INTERFACE_MODE_GMII;
dev->autoneg = AUTONEG_ENABLE;
@@ -694,10 +694,16 @@ int genphy_update_link(struct phy_device
if (status < 0)
return status;
- if ((status & BMSR_LSTATUS) == 0)
+ if ((status & BMSR_LSTATUS) == 0) {
+ if (phydev->link==0)
+ return 1;
phydev->link = 0;
- else
+ }
+ else {
+ if (phydev->link==1)
+ return 1;
phydev->link = 1;
+ }
return 0;
}
This patch fix the PHY poller, which can block the whole system. On a Freescale PPC 834x this result in a delay of 450 us due the slow communication with the PHY chip. For PHY chips without interrupts, the status of the ethernet will be polled every 2 sec. The poll function will read some register of the MII PHY. The time between the sending the MII_READ_COMMAND and receiving the result is more the 100 us on a PPC 834x. The patch modifies the poller a lit bit. Only a link status state change will result in a successive detection of the connection type. The poll cycle on the other hand will be increased to every seconds. Together this patch will prevent a blocking of nearly 400 us every two seconds of the whole system on a PPC 834x. The patch is against kernel 2.6.33. Please merge it. Signed-off-by: Stefani Seibold <stefani@seibold.net> --- phy.c | 5 ++--- phy_device.c | 12 +++++++++--- 2 files changed, 11 insertions(+), 6 deletions(-)