This is a note to let you know that I've just added the patch titled
net: phy: micrel: lan8814: Fix when enabling/disabling 1-step timestamping
to the 6.6-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-micrel-lan8814-fix-when-enabling-disabling-1-step-timestamping.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From de99e1ea3a35f23ff83a31d6b08f43d27b2c6345 Mon Sep 17 00:00:00 2001
From: Horatiu Vultur <horatiu.vultur@xxxxxxxxxxxxx>
Date: Tue, 2 Apr 2024 09:16:34 +0200
Subject: net: phy: micrel: lan8814: Fix when enabling/disabling 1-step timestamping
From: Horatiu Vultur <horatiu.vultur@xxxxxxxxxxxxx>
commit de99e1ea3a35f23ff83a31d6b08f43d27b2c6345 upstream.
There are 2 issues with the blamed commit.
1. When the phy is initialized, it would enable the disabled of UDPv4
checksums. The UDPv6 checksum is already enabled by default. So when
1-step is configured then it would clear these flags.
2. After the 1-step is configured, then if 2-step is configured then the
1-step would be still configured because it is not clearing the flag.
So the sync frames will still have origin timestamps set.
Fix this by reading first the value of the register and then
just change bit 12 as this one determines if the timestamp needs to
be inserted in the frame, without changing any other bits.
Fixes: ece19502834d ("net: phy: micrel: 1588 support for LAN8814 phy")
Signed-off-by: Horatiu Vultur <horatiu.vultur@xxxxxxxxxxxxx>
Reviewed-by: Divya Koppera <divya.koppera@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240402071634.2483524-1-horatiu.vultur@xxxxxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/phy/micrel.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
--- a/drivers/net/phy/micrel.c
+++ b/drivers/net/phy/micrel.c
@@ -2388,6 +2388,7 @@ static int lan8814_hwtstamp(struct mii_t
struct hwtstamp_config config;
int txcfg = 0, rxcfg = 0;
int pkt_ts_enable;
+ int tx_mod;
if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
return -EFAULT;
@@ -2437,9 +2438,14 @@ static int lan8814_hwtstamp(struct mii_t
lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_RX_TIMESTAMP_EN, pkt_ts_enable);
lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_TX_TIMESTAMP_EN, pkt_ts_enable);
- if (ptp_priv->hwts_tx_type == HWTSTAMP_TX_ONESTEP_SYNC)
+ tx_mod = lanphy_read_page_reg(ptp_priv->phydev, 5, PTP_TX_MOD);
+ if (ptp_priv->hwts_tx_type == HWTSTAMP_TX_ONESTEP_SYNC) {
lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_TX_MOD,
- PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_);
+ tx_mod | PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_);
+ } else if (ptp_priv->hwts_tx_type == HWTSTAMP_TX_ON) {
+ lanphy_write_page_reg(ptp_priv->phydev, 5, PTP_TX_MOD,
+ tx_mod & ~PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_);
+ }
if (config.rx_filter != HWTSTAMP_FILTER_NONE)
lan8814_config_ts_intr(ptp_priv->phydev, true);
Patches currently in stable-queue which might be from horatiu.vultur@xxxxxxxxxxxxx are
queue-6.6/net-phy-micrel-lan8814-fix-when-enabling-disabling-1-step-timestamping.patch
