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kernel: net: phy: c45: check validity of 10GbE LPA

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Only use link-partner advertisement bits for 10GbE modes if they are
actually valid. Check LOCALOK and REMOTEOK bits and clear 10GbE modes
unless both of them are set.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle 2026-01-03 21:05:35 +00:00
parent dfce21df96
commit 96ff31b94a
1 changed files with 29 additions and 0 deletions
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29
target/linux/generic/pending-6.12/713-net-phy-c45-check-validity-of-10GbE-link-partner.patch Normal file
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@ -0,0 +1,29 @@
From 7d719484930bc10c8472c0d43b94b68087541b24 Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Sat, 22 Apr 2023 01:25:39 +0100
Subject: [PATCH] net: phy: c45: check validity of 10GbE link-partner
advertisement
Only use link-partner advertisement bits for 10GbE modes if they are
actually valid. Check LOCALOK and REMOTEOK bits and clear 10GbE modes
unless both of them are set.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
--- a/include/linux/mdio.h
+++ b/include/linux/mdio.h
@@ -323,8 +323,14 @@ static inline u32 linkmode_adv_to_mii_10
* to linkmode advertisement settings. Other bits in advertising aren't changed.
*/
static inline void mii_10gbt_stat_mod_linkmode_lpa_t(unsigned long *advertising,
- u32 lpa)
+ u32 lpa_in)
{
+ u32 lpa = lpa_in;
+
+ if (!(lpa & MDIO_AN_10GBT_STAT_REMOK) ||
+ !(lpa & MDIO_AN_10GBT_STAT_LOCOK))
+ lpa = 0;
+
linkmode_mod_bit(ETHTOOL_LINK_MODE_2500baseT_Full_BIT,
advertising, lpa & MDIO_AN_10GBT_STAT_LP2_5G);
linkmode_mod_bit(ETHTOOL_LINK_MODE_5000baseT_Full_BIT,