In a device where the ar8031 operates in SGMII mode, we observed that after a suspend-resume cycle in very rare cases the copper side autonegotiation secceeds but the SGMII side fails to come up.
As a work-around, a patch was provided that on suspend and resume powers the SGMII link down and up along with the copper side. This fixed the observed failure, but introduced a regression Timur Tabi observed: once the SGMII is powered down, the PHY is inaccessible by the CPU and with that e.g. can't be re-initialized after suspend. Since the original issue could not be reproduced by others, this series provides an alternative handling: * the first patch reverts the prvious fix that powers down SGMII * the second patch adds double-checking for the observed failure condition Zefir Kurtisi (2): Revert "at803x: fix suspend/resume for SGMII link" at803x: double check SGMII side autoneg drivers/net/phy/at803x.c | 65 +++++++++++++++++++++++++++++------------------- 1 file changed, 39 insertions(+), 26 deletions(-) -- 2.7.4
