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net/mlx5: Don't call timecounter cyc2time directly from 1PPS flow 

[ Upstream commit 0d2ffdc8d4 ]

Before calling timecounter_cyc2time(), clock->lock must be taken.
Use mlx5_timecounter_cyc2time instead which guarantees a safe access.

Fixes: afc98a0b46 ("net/mlx5: Update ptp_clock_event foreach PPS event")
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Eran Ben Elisha 2020-06-16 12:07:10 +03:00 committed by Greg Kroah-Hartman
parent 50185a14fe
commit e757a39c2d
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
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@ -498,8 +498,9 @@ static int mlx5_pps_event(struct notifier_block *nb,
switch (clock->ptp_info.pin_config[pin].func) {
case PTP_PF_EXTTS:
ptp_event.index = pin;
ptp_event.timestamp = timecounter_cyc2time(&clock->tc,
be64_to_cpu(eqe->data.pps.time_stamp));
ptp_event.timestamp =
mlx5_timecounter_cyc2time(clock,
be64_to_cpu(eqe->data.pps.time_stamp));
if (clock->pps_info.enabled) {
ptp_event.type = PTP_CLOCK_PPSUSR;
ptp_event.pps_times.ts_real =