net: sfp: extend bitrate-derived mode for 2500BASE-X

Extend the bitrate-derived support to include 2500BASE-X for modules
that report a bitrate of 2500Mbaud.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/E1kyYQf-0004iY-Gh@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/drivers/net/phy/sfp-bus.c b/drivers/net/phy/sfp-bus.c
index 20b91f5..cdfa0a1 100644 (file)
--- a/drivers/net/phy/sfp-bus.c
+++ b/drivers/net/phy/sfp-bus.c
@@ -337,11 +337,16 @@ void sfp_parse_support(struct sfp_bus *bus, const struct sfp_eeprom_id *id,
         * the bitrate to determine supported modes. Some BiDi modules (eg,
         * 1310nm/1550nm) are not 1000BASE-BX compliant due to the differing
         * wavelengths, so do not set any transceiver bits.
+        *
+        * Do the same for modules supporting 2500BASE-X. Note that some
+        * modules use 2500Mbaud rather than 3100 or 3200Mbaud for
+        * 2500BASE-X, so we allow some slack here.
         */
-       if (bitmap_empty(modes, __ETHTOOL_LINK_MODE_MASK_NBITS)) {
-               /* If the bit rate allows 1000baseX */
-               if (br_nom && br_min <= 1300 && br_max >= 1200)
+       if (bitmap_empty(modes, __ETHTOOL_LINK_MODE_MASK_NBITS) && br_nom) {
+               if (br_min <= 1300 && br_max >= 1200)
                        phylink_set(modes, 1000baseX_Full);
+               if (br_min <= 3200 && br_max >= 2500)
+                       phylink_set(modes, 2500baseX_Full);
        }
 
        if (bus->sfp_quirk)