From: Richard Cochran Date: Thu, 14 Nov 2019 18:45:06 +0000 (-0800) Subject: mlx5: Reject requests to enable time stamping on both edges. X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ca12cf5ac9c8fcbf64bc18e0dc2974dc3217f97d;p=linux.git mlx5: Reject requests to enable time stamping on both edges. This driver enables rising edge or falling edge, but not both, and so this patch validates that the request contains only one of the two edges. Signed-off-by: Richard Cochran Reviewed-by: Saeed Mahameed Signed-off-by: David S. Miller --- diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c index 819097d9b583b..43f97601b5000 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c @@ -243,6 +243,12 @@ static int mlx5_extts_configure(struct ptp_clock_info *ptp, PTP_STRICT_FLAGS)) return -EOPNOTSUPP; + /* Reject requests to enable time stamping on both edges. */ + if ((rq->extts.flags & PTP_STRICT_FLAGS) && + (rq->extts.flags & PTP_ENABLE_FEATURE) && + (rq->extts.flags & PTP_EXTTS_EDGES) == PTP_EXTTS_EDGES) + return -EOPNOTSUPP; + if (rq->extts.index >= clock->ptp_info.n_pins) return -EINVAL;