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author | Heiner Kallweit | 2019-02-07 20:22:20 +0100 |
---|---|---|
committer | David S. Miller | 2019-02-09 08:01:49 +0100 |
commit | c397ab21ba362d5c5215e53f36685a9fffc45f66 (patch) | |
tree | 7a96407c8fcaff6869aa3e42c4b892c5f31381f3 /drivers/net/phy/phy-c45.c | |
parent | fm10k: use struct_size() in kzalloc() (diff) | |
download | kernel-qcow2-linux-c397ab21ba362d5c5215e53f36685a9fffc45f66.tar.gz kernel-qcow2-linux-c397ab21ba362d5c5215e53f36685a9fffc45f66.tar.xz kernel-qcow2-linux-c397ab21ba362d5c5215e53f36685a9fffc45f66.zip |
net: phy: don't double-read link status register if link is up
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>
Diffstat (limited to 'drivers/net/phy/phy-c45.c')
-rw-r--r-- | drivers/net/phy/phy-c45.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/net/phy/phy-c45.c b/drivers/net/phy/phy-c45.c index 706a92a8c1b2..eff9e5a4d831 100644 --- a/drivers/net/phy/phy-c45.c +++ b/drivers/net/phy/phy-c45.c @@ -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); |