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net: phy: don't double-read link status register if link is up

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The link status register latches link-down events. Therefore, if link
is reported as being up, there's no need for a second read.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Heiner Kallweit 2019-02-07 20:22:20 +01:00 committed by David S. Miller
parent 9a00536c38
commit c397ab21ba
2 changed files with 7 additions and 1 deletions
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2
drivers/net/phy/phy-c45.c
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@ -148,6 +148,8 @@ int genphy_c45_read_link(struct phy_device *phydev)
val = phy_read_mmd(phydev, devad, MDIO_STAT1);
if (val < 0)
return val;
else if (val & MDIO_STAT1_LSTATUS)
continue;
}
val = phy_read_mmd(phydev, devad, MDIO_STAT1);

6
drivers/net/phy/phy_device.c
View File

@ -1735,8 +1735,12 @@ int genphy_update_link(struct phy_device *phydev)
*/
if (!phy_polling_mode(phydev)) {
status = phy_read(phydev, MII_BMSR);
if (status < 0)
if (status < 0) {
return status;
} else if (status & BMSR_LSTATUS) {
phydev->link = 1;
return 0;
}
}
/* Read link and autonegotiation status */