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From 7a77233ec6d114322e2c4f71b4e26dbecd9ea8a7 Mon Sep 17 00:00:00 2001
From: Russell King <rmk+kernel@armlinux.org.uk>
Date: Wed, 9 Dec 2020 11:22:54 +0000
Subject: net: sfp: relax bitrate-derived mode check
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Do not check the encoding when deriving 1000BASE-X from the bitrate
when no other modes are discovered. Some GPON modules (VSOL V2801F
and CarlitoxxPro CPGOS03-0490 v2.0) indicate NRZ encoding with a
1200Mbaud bitrate, but should be driven with 1000BASE-X on the host
side.
Tested-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/phy/sfp-bus.c | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
--- a/drivers/net/phy/sfp-bus.c
+++ b/drivers/net/phy/sfp-bus.c
@@ -349,14 +349,13 @@ void sfp_parse_support(struct sfp_bus *b
}
/* If we haven't discovered any modes that this module supports, try
- * the encoding and 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.
+ * 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.
*/
if (bitmap_empty(modes, __ETHTOOL_LINK_MODE_MASK_NBITS)) {
- /* If the encoding and bit rate allows 1000baseX */
- if (id->base.encoding == SFF8024_ENCODING_8B10B && br_nom &&
- br_min <= 1300 && br_max >= 1200)
+ /* If the bit rate allows 1000baseX */
+ if (br_nom && br_min <= 1300 && br_max >= 1200)
phylink_set(modes, 1000baseX_Full);
}
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