This is a note to let you know that I've just added the patch titled
net: enetc: VFs do not support HWTSTAMP_TX_ONESTEP_SYNC
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-enetc-vfs-do-not-support-hwtstamp_tx_onestep_syn.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.
commit c800e17acff881d5a9294e9b367477737cffb586
Author: Wei Fang <wei.fang@xxxxxxx>
Date: Mon Feb 24 19:12:47 2025 +0800
net: enetc: VFs do not support HWTSTAMP_TX_ONESTEP_SYNC
[ Upstream commit a562d0c4a893eae3ea51d512c4d90ab858a6b7ec ]
Actually ENETC VFs do not support HWTSTAMP_TX_ONESTEP_SYNC because only
ENETC PF can access PMa_SINGLE_STEP registers. And there will be a crash
if VFs are used to test one-step timestamp, the crash log as follows.
[ 129.110909] Unable to handle kernel paging request at virtual address 00000000000080c0
[ 129.287769] Call trace:
[ 129.290219] enetc_port_mac_wr+0x30/0xec (P)
[ 129.294504] enetc_start_xmit+0xda4/0xe74
[ 129.298525] enetc_xmit+0x70/0xec
[ 129.301848] dev_hard_start_xmit+0x98/0x118
Fixes: 41514737ecaa ("enetc: add get_ts_info interface for ethtool")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Wei Fang <wei.fang@xxxxxxx>
Reviewed-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>
Tested-by: Vladimir Oltean <vladimir.oltean@xxxxxxx>
Link: https://patch.msgid.link/20250224111251.1061098-5-wei.fang@xxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/freescale/enetc/enetc.c b/drivers/net/ethernet/freescale/enetc/enetc.c
index 30653830981d1..8feb7d4226bb5 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc.c
@@ -2971,6 +2971,9 @@ static int enetc_hwtstamp_set(struct net_device *ndev, struct ifreq *ifr)
new_offloads |= ENETC_F_TX_TSTAMP;
break;
case HWTSTAMP_TX_ONESTEP_SYNC:
+ if (!enetc_si_is_pf(priv->si))
+ return -EOPNOTSUPP;
+
new_offloads &= ~ENETC_F_TX_TSTAMP_MASK;
new_offloads |= ENETC_F_TX_ONESTEP_SYNC_TSTAMP;
break;
diff --git a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
index 39fbc465746f7..1e3e0073276ec 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_ethtool.c
@@ -840,6 +840,7 @@ static int enetc_set_coalesce(struct net_device *ndev,
static int enetc_get_ts_info(struct net_device *ndev,
struct ethtool_ts_info *info)
{
+ struct enetc_ndev_priv *priv = netdev_priv(ndev);
int *phc_idx;
phc_idx = symbol_get(enetc_phc_index);
@@ -860,8 +861,10 @@ static int enetc_get_ts_info(struct net_device *ndev,
SOF_TIMESTAMPING_TX_SOFTWARE;
info->tx_types = (1 << HWTSTAMP_TX_OFF) |
- (1 << HWTSTAMP_TX_ON) |
- (1 << HWTSTAMP_TX_ONESTEP_SYNC);
+ (1 << HWTSTAMP_TX_ON);
+
+ if (enetc_si_is_pf(priv->si))
+ info->tx_types |= (1 << HWTSTAMP_TX_ONESTEP_SYNC);
info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
(1 << HWTSTAMP_FILTER_ALL);
