--- /dev/null
+From 514277d60844fc1488725c47f2dd6024c35dd016 Mon Sep 17 00:00:00 2001
+From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Date: Tue, 2 Jul 2024 10:41:01 +0200
+Subject: Revert "net: sfp: enhance quirk for Fibrestore 2.5G copper SFP module"
+
+From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+
+This reverts commit b3dcad0bfd62fcc9367d8092a71918db53804f53 which is
+commit cd4a32e60061789676f7f018a94fcc9ec56732a0 upstream.
+
+Turned out that this should not have been applied to the stable tree.
+
+Link: https://lore.kernel.org/r/20240628172211.17ccefe9@dellmb
+Reported-by: Marek BehĂșn <kabel@kernel.org>
+Cc: Jiri Pirko <jiri@nvidia.com>
+Cc: Jakub Kicinski <kuba@kernel.org>
+Cc: Sasha Levin <sashal@kernel.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ drivers/net/phy/sfp.c | 18 ++++++------------
+ 1 file changed, 6 insertions(+), 12 deletions(-)
+
+--- a/drivers/net/phy/sfp.c
++++ b/drivers/net/phy/sfp.c
+@@ -385,23 +385,18 @@ static void sfp_fixup_rollball(struct sf
+ sfp->phy_t_retry = msecs_to_jiffies(1000);
+ }
+
+-static void sfp_fixup_fs_2_5gt(struct sfp *sfp)
++static void sfp_fixup_fs_10gt(struct sfp *sfp)
+ {
++ sfp_fixup_10gbaset_30m(sfp);
+ sfp_fixup_rollball(sfp);
+
+- /* The RollBall fixup is not enough for FS modules, the PHY chip inside
++ /* The RollBall fixup is not enough for FS modules, the AQR chip inside
+ * them does not return 0xffff for PHY ID registers in all MMDs for the
+ * while initializing. They need a 4 second wait before accessing PHY.
+ */
+ sfp->module_t_wait = msecs_to_jiffies(4000);
+ }
+
+-static void sfp_fixup_fs_10gt(struct sfp *sfp)
+-{
+- sfp_fixup_10gbaset_30m(sfp);
+- sfp_fixup_fs_2_5gt(sfp);
+-}
+-
+ static void sfp_fixup_halny_gsfp(struct sfp *sfp)
+ {
+ /* Ignore the TX_FAULT and LOS signals on this module.
+@@ -477,10 +472,6 @@ static const struct sfp_quirk sfp_quirks
+ // Rollball protocol to talk to the PHY.
+ SFP_QUIRK_F("FS", "SFP-10G-T", sfp_fixup_fs_10gt),
+
+- // Fiberstore SFP-2.5G-T uses Rollball protocol to talk to the PHY and
+- // needs 4 sec wait before probing the PHY.
+- SFP_QUIRK_F("FS", "SFP-2.5G-T", sfp_fixup_fs_2_5gt),
+-
+ // Fiberstore GPON-ONU-34-20BI can operate at 2500base-X, but report 1.2GBd
+ // NRZ in their EEPROM
+ SFP_QUIRK("FS", "GPON-ONU-34-20BI", sfp_quirk_2500basex,
+@@ -497,6 +488,9 @@ static const struct sfp_quirk sfp_quirks
+ SFP_QUIRK("HUAWEI", "MA5671A", sfp_quirk_2500basex,
+ sfp_fixup_ignore_tx_fault),
+
++ // FS 2.5G Base-T
++ SFP_QUIRK_M("FS", "SFP-2.5G-T", sfp_quirk_oem_2_5g),
++
+ // Lantech 8330-262D-E can operate at 2500base-X, but incorrectly report
+ // 2500MBd NRZ in their EEPROM
+ SFP_QUIRK_M("Lantech", "8330-262D-E", sfp_quirk_2500basex),