diff options
| author | Christian Eggers <ceggers@arri.de> | 2023-01-10 11:49:26 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-01-13 11:40:41 +0300 |
| commit | a32190b154bde4a3bf2fddb9367aec49be09b15d (patch) | |
| tree | ab0a58fc703fd9bc2ab6a1ebf90076578243e376 /drivers/net/dsa | |
| parent | ab32f56a4100f879c5064b45c7657bb4be175ac3 (diff) | |
| download | linux-a32190b154bde4a3bf2fddb9367aec49be09b15d.tar.xz | |
net: dsa: microchip: ptp: move pdelay_rsp correction field to tail tag
For PDelay_Resp messages we will likely have a negative value in the
correction field. The switch hardware cannot correctly update such
values (produces an off by one error in the UDP checksum), so it must be
moved to the time stamp field in the tail tag. Format of the correction
field is 48 bit ns + 16 bit fractional ns. After updating the
correction field, clone is no longer required hence it is freed.
Signed-off-by: Christian Eggers <ceggers@arri.de>
Co-developed-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dsa')
| -rw-r--r-- | drivers/net/dsa/microchip/ksz_ptp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/dsa/microchip/ksz_ptp.c b/drivers/net/dsa/microchip/ksz_ptp.c index 6edce141cbd7..2a68649943d5 100644 --- a/drivers/net/dsa/microchip/ksz_ptp.c +++ b/drivers/net/dsa/microchip/ksz_ptp.c @@ -267,6 +267,10 @@ void ksz_port_txtstamp(struct dsa_switch *ds, int port, struct sk_buff *skb) switch (ptp_msg_type) { case PTP_MSGTYPE_PDELAY_REQ: break; + case PTP_MSGTYPE_PDELAY_RESP: + KSZ_SKB_CB(skb)->ptp_type = type; + KSZ_SKB_CB(skb)->update_correction = true; + return; default: return; |