net: sfp: add quirk for OEM 2.5G optical modules

Some OEM-branded SFP modules are incorrectly detected as
1000Base-X and fail to establish link on 2.5G-capable ports.

These modules do not properly advertise 2500Base-X capability
in their EEPROM and require forcing the correct SerDes mode.

Add sfp_quirk_2500basex for:

  - OEM SFP-2.5G-LH03-B
  - OEM SFP-2.5G-LH20-A

Both modules report:

  Vendor name: OEM
  Vendor PN: SFP-2.5G-LH03-B / SFP-2.5G-LH20-A

Tested on OpenWrt with successful 2.5G link establishment.

Signed-off-by: Wei Qisen <weixiansen574@163.com>
Link: https://patch.msgid.link/20260526055206.1750-1-weixiansen574@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c
index bd970f753beb6c29e478294a7aa80ecb98f32871..7a865f69a6bda0f7ae9e5e44d364e6cf587fd9df 100644 (file)
--- a/drivers/net/phy/sfp.c
+++ b/drivers/net/phy/sfp.c
@@ -583,6 +583,8 @@ static const struct sfp_quirk sfp_quirks[] = {
        SFP_QUIRK_S("OEM", "SFP-2.5G-T", sfp_quirk_oem_2_5g),
        SFP_QUIRK_S("OEM", "SFP-2.5G-BX10-D", sfp_quirk_2500basex),
        SFP_QUIRK_S("OEM", "SFP-2.5G-BX10-U", sfp_quirk_2500basex),
+       SFP_QUIRK_S("OEM", "SFP-2.5G-LH03-B", sfp_quirk_2500basex),
+       SFP_QUIRK_S("OEM", "SFP-2.5G-LH20-A", sfp_quirk_2500basex),
        SFP_QUIRK_F("OEM", "RTSFP-10", sfp_fixup_rollball_cc),
        SFP_QUIRK_F("OEM", "RTSFP-10G", sfp_fixup_rollball_cc),
        SFP_QUIRK_F("Turris", "RTSFP-2.5G", sfp_fixup_rollball),