This is a note to let you know that I've just added the patch titled
net: phy: prefer 1000baseT over 1000baseKX
to the 5.10-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-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit e1da338e282a817670c805bb9af1a55067d743b1
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 8d333d3084ed3..cccb83dae673b 100644
--- a/drivers/net/phy/phy-core.c
+++ b/drivers/net/phy/phy-core.c
@@ -161,11 +161,11 @@ 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 ),
