6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Danielle Ratson <danieller@xxxxxxxxxx>
[ Upstream commit bc2de151ab6ad0762a04563527ec42e54dde572a ]
Currently, in Spectrum-2 and above, time stamps are extracted from the CQE
into the time stamp fields in 'struct mlxsw_skb_cb', only when the CQE
time stamp type is UTC. The time stamps are read directly from the CQE and
software can get the time stamp in UTC format using CQEv2.
>From Spectrum-4, the time stamps that are read from the CQE are allowed
to be also from MIRROR_UTC type.
Therefore, we get a warning [1] from the driver that the time stamp fields
were not set, when LLDP control packet is sent.
Allow the time stamp type to be MIRROR_UTC and set the time stamp in this
case as well.
[1]
WARNING: CPU: 11 PID: 0 at drivers/net/ethernet/mellanox/mlxsw/spectrum_ptp.c:1409 mlxsw_sp2_ptp_hwtstamp_fill+0x1f/0x70 [mlxsw_spectrum]
[...]
Call Trace:
<IRQ>
mlxsw_sp2_ptp_receive+0x3c/0x80 [mlxsw_spectrum]
mlxsw_core_skb_receive+0x119/0x190 [mlxsw_core]
mlxsw_pci_cq_tasklet+0x3c9/0x780 [mlxsw_pci]
tasklet_action_common.constprop.0+0x9f/0x110
__do_softirq+0xbb/0x296
irq_exit_rcu+0x79/0xa0
common_interrupt+0x86/0xa0
</IRQ>
<TASK>
Fixes: 4735402173e6 ("mlxsw: spectrum: Extend to support Spectrum-4 ASIC")
Signed-off-by: Danielle Ratson <danieller@xxxxxxxxxx>
Reviewed-by: Ido Schimmel <idosch@xxxxxxxxxx>
Signed-off-by: Petr Machata <petrm@xxxxxxxxxx>
Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
Link: https://lore.kernel.org/r/bcef4d044ef608a4e258d33a7ec0ecd91f480db5.1692268427.git.petrm@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/net/ethernet/mellanox/mlxsw/pci.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlxsw/pci.c b/drivers/net/ethernet/mellanox/mlxsw/pci.c
index c968309657dd1..51eea1f0529c8 100644
--- a/drivers/net/ethernet/mellanox/mlxsw/pci.c
+++ b/drivers/net/ethernet/mellanox/mlxsw/pci.c
@@ -517,11 +517,15 @@ static void mlxsw_pci_skb_cb_ts_set(struct mlxsw_pci *mlxsw_pci,
struct sk_buff *skb,
enum mlxsw_pci_cqe_v cqe_v, char *cqe)
{
+ u8 ts_type;
+
if (cqe_v != MLXSW_PCI_CQE_V2)
return;
- if (mlxsw_pci_cqe2_time_stamp_type_get(cqe) !=
- MLXSW_PCI_CQE_TIME_STAMP_TYPE_UTC)
+ ts_type = mlxsw_pci_cqe2_time_stamp_type_get(cqe);
+
+ if (ts_type != MLXSW_PCI_CQE_TIME_STAMP_TYPE_UTC &&
+ ts_type != MLXSW_PCI_CQE_TIME_STAMP_TYPE_MIRROR_UTC)
return;
mlxsw_skb_cb(skb)->cqe_ts.sec = mlxsw_pci_cqe2_time_stamp_sec_get(cqe);
--
2.40.1
