When ethtool -L changes queue counts, ice_vsi_recfg_qs() closes and
rebuilds the VSI, reallocating Rx rings. The newly allocated rings have
ptp_rx cleared, so RX hardware timestamps are no longer attached to skb
until hwtstamp configuration is applied again.
Restore timestamp mode after ice_vsi_open() in the queue reconfiguration
path, matching reset/rebuild behavior and ensuring newly rebuilt Rx rings
have PTP RX timestamping re-enabled.
Testing hints:
- run ptp4l application in client synchronization mode:
ptp4l -i ethX -m -s
- run PTP traffic
- change queue number on ethX netdev interface:
ethtool -L ethX combined new_queue_size
- observe ptp4l output
- expected result: no "received DELAY_REQ without timestamp" messages
Fixes: 77a781155a65 ("ice: enable receive hardware timestamping")
Cc: [email protected]
Reviewed-by: Aleksandr Loktionov <[email protected]>
Signed-off-by: Grzegorz Nitka <[email protected]>
---
drivers/net/ethernet/intel/ice/ice_main.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c
b/drivers/net/ethernet/intel/ice/ice_main.c
index 79f2906eda99..b87accaf7d14 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -4110,6 +4110,12 @@ int ice_vsi_recfg_qs(struct ice_vsi *vsi, int new_rx,
int new_tx, bool locked)
}
ice_pf_dcb_recfg(pf, locked);
ice_vsi_open(vsi);
+ /* Rx rings are reallocated during VSI rebuild and lose their ptp_rx
+ * flag. Restore timestamp mode so newly allocated rings are set up
+ * for hardware Rx timestamping.
+ */
+ if (test_bit(ICE_FLAG_PTP_SUPPORTED, pf->flags))
+ ice_ptp_restore_timestamp_mode(pf);
goto done;
rebuild_err:
base-commit: f0cfdedb42fe64b06fd048bd490ef835beeda658
--
2.39.3
