This is a note to let you know that I've just added the patch titled net: phy: prefer 1000baseT over 1000baseKX to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-phy-prefer-1000baset-over-1000basekx.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit a4adfdb850a4c26350f249293e38b4a1bb378af4 Author: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx> Date: Wed Dec 8 11:36:30 2021 +0000 net: phy: prefer 1000baseT over 1000baseKX [ Upstream commit f20f94f7f52c4685c81754f489ffcc72186e8bdb ] The PHY settings table is supposed to be sorted by descending match priority - in other words, earlier entries are preferred over later entries. The order of 1000baseKX/Full and 1000baseT/Full is such that we prefer 1000baseKX/Full over 1000baseT/Full, but 1000baseKX/Full is a lot rarer than 1000baseT/Full, and thus is much less likely to be preferred. This causes phylink problems - it means a fixed link specifying a speed of 1G and full duplex gets an ethtool linkmode of 1000baseKX/Full rather than 1000baseT/Full as would be expected - and since we offer userspace a software emulation of a conventional copper PHY, we want to offer copper modes in preference to anything else. However, we do still want to allow the rarer modes as well. Hence, let's reorder these two modes to prefer copper. Tested-by: Tom Lendacky <thomas.lendacky@xxxxxxx> Signed-off-by: Russell King (Oracle) <rmk+kernel@xxxxxxxxxxxxxxx> Reviewed-by: Andrew Lunn <andrew@xxxxxxx> Reported-by: Florian Fainelli <f.fainelli@xxxxxxxxx> Link: https://lore.kernel.org/r/E1muvFO-00F6jY-1K@xxxxxxxxxxxxxxxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/phy/phy-core.c b/drivers/net/phy/phy-core.c index 2870c33b8975d..271fc01f7f7fd 100644 --- a/drivers/net/phy/phy-core.c +++ b/drivers/net/phy/phy-core.c @@ -162,11 +162,11 @@ static const struct phy_setting settings[] = { PHY_SETTING( 2500, FULL, 2500baseT_Full ), PHY_SETTING( 2500, FULL, 2500baseX_Full ), /* 1G */ - PHY_SETTING( 1000, FULL, 1000baseKX_Full ), PHY_SETTING( 1000, FULL, 1000baseT_Full ), PHY_SETTING( 1000, HALF, 1000baseT_Half ), PHY_SETTING( 1000, FULL, 1000baseT1_Full ), PHY_SETTING( 1000, FULL, 1000baseX_Full ), + PHY_SETTING( 1000, FULL, 1000baseKX_Full ), /* 100M */ PHY_SETTING( 100, FULL, 100baseT_Full ), PHY_SETTING( 100, FULL, 100baseT1_Full ),