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generic: 6.6: net: sfp-bus: fix SFP mode detect from bitrate

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Backport commit fixing detection of SFP modules which has been broken
since Linux 6.4 for some modules.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
This commit is contained in:
Daniel Golle 2024-05-30 12:06:26 +01:00
parent a07fca99cb
commit 176eb7d8ef
1 changed files with 46 additions and 0 deletions
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46
target/linux/generic/backport-6.6/701-v6.8-net-sfp-bus-fix-SFP-mode-detect-from-bitrate.patch Normal file
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@ -0,0 +1,46 @@
From 97eb5d51b4a584a60e5d096bdb6b33edc9f50d8d Mon Sep 17 00:00:00 2001
From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Date: Mon, 15 Jan 2024 12:43:38 +0000
Subject: [PATCH] net: sfp-bus: fix SFP mode detect from bitrate
The referenced commit moved the setting of the Autoneg and pause bits
early in sfp_parse_support(). However, we check whether the modes are
empty before using the bitrate to set some modes. Setting these bits
so early causes that test to always be false, preventing this working,
and thus some modules that used to work no longer do.
Move them just before the call to the quirk.
Fixes: 8110633db49d ("net: sfp-bus: allow SFP quirks to override Autoneg and pause bits")
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Link: https://lore.kernel.org/r/E1rPMJW-001Ahf-L0@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
drivers/net/phy/sfp-bus.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/drivers/net/phy/sfp-bus.c
+++ b/drivers/net/phy/sfp-bus.c
@@ -151,10 +151,6 @@ void sfp_parse_support(struct sfp_bus *b
unsigned int br_min, br_nom, br_max;
__ETHTOOL_DECLARE_LINK_MODE_MASK(modes) = { 0, };
- phylink_set(modes, Autoneg);
- phylink_set(modes, Pause);
- phylink_set(modes, Asym_Pause);
-
/* Decode the bitrate information to MBd */
br_min = br_nom = br_max = 0;
if (id->base.br_nominal) {
@@ -339,6 +335,10 @@ void sfp_parse_support(struct sfp_bus *b
}
}
+ phylink_set(modes, Autoneg);
+ phylink_set(modes, Pause);
+ phylink_set(modes, Asym_Pause);
+
if (bus->sfp_quirk && bus->sfp_quirk->modes)
bus->sfp_quirk->modes(id, modes, interfaces);