net: phy: fix race in genphy_update_link
In phy_start_aneg() autoneg is started, and immediately after that link and autoneg status are read. As reported in [0] it can happen that at time of this read the PHY has reset the "aneg complete" bit but not yet the "link up" bit, what can result in a false link-up detection. To fix this don't report link as up if we're in aneg mode and PHY doesn't signal "aneg complete". [0] https://marc.info/?t=156413509900003&r=1&w=2 Fixes: 4950c2ba ("net: phy: fix autoneg mismatch case in genphy_read_status") Reported-by:liuyonglong <liuyonglong@huawei.com> Tested-by:
liuyonglong <liuyonglong@huawei.com> Signed-off-by:
Heiner Kallweit <hkallweit1@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
2802d2cf
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