This is a note to let you know that I've just added the patch titled
net: phy: dp83869: fix default value for tx-/rx-internal-delay
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-phy-dp83869-fix-default-value-for-tx-rx-internal-delay.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 82e2c39f9ef78896e9b634dfd82dc042e6956bb7 Mon Sep 17 00:00:00 2001
From: Josua Mayer <josua@xxxxxxxxxxxxx>
Date: Thu, 23 Mar 2023 12:25:36 +0200
Subject: net: phy: dp83869: fix default value for tx-/rx-internal-delay
From: Josua Mayer <josua@xxxxxxxxxxxxx>
commit 82e2c39f9ef78896e9b634dfd82dc042e6956bb7 upstream.
dp83869 internally uses a look-up table for mapping supported delays in
nanoseconds to register values.
When specific delays are defined in device-tree, phy_get_internal_delay
does the lookup automatically returning an index.
The default case wrongly assigns the nanoseconds value from the lookup
table, resulting in numeric value 2000 applied to delay configuration
register, rather than the expected index values 0-7 (7 for 2000).
Ultimately this issue broke RX for 1Gbps links.
Fix default delay configuration by assigning the intended index value
directly.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 736b25afe284 ("net: dp83869: Add RGMII internal delay configuration")
Co-developed-by: Yazan Shhady <yazan.shhady@xxxxxxxxxxxxx>
Signed-off-by: Yazan Shhady <yazan.shhady@xxxxxxxxxxxxx>
Signed-off-by: Josua Mayer <josua@xxxxxxxxxxxxx>
Reviewed-by: Simon Horman <simon.horman@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230323102536.31988-1-josua@xxxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/phy/dp83869.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
--- a/drivers/net/phy/dp83869.c
+++ b/drivers/net/phy/dp83869.c
@@ -587,15 +587,13 @@ static int dp83869_of_init(struct phy_de
&dp83869_internal_delay[0],
delay_size, true);
if (dp83869->rx_int_delay < 0)
- dp83869->rx_int_delay =
- dp83869_internal_delay[DP83869_CLK_DELAY_DEF];
+ dp83869->rx_int_delay = DP83869_CLK_DELAY_DEF;
dp83869->tx_int_delay = phy_get_internal_delay(phydev, dev,
&dp83869_internal_delay[0],
delay_size, false);
if (dp83869->tx_int_delay < 0)
- dp83869->tx_int_delay =
- dp83869_internal_delay[DP83869_CLK_DELAY_DEF];
+ dp83869->tx_int_delay = DP83869_CLK_DELAY_DEF;
return ret;
}
Patches currently in stable-queue which might be from josua@xxxxxxxxxxxxx are
queue-5.15/net-phy-dp83869-fix-default-value-for-tx-rx-internal-delay.patch
