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authorRichard Cochran <richardcochran@gmail.com>2019-11-14 10:45:06 -0800
committerDavid S. Miller <davem@davemloft.net>2019-11-15 12:48:33 -0800
commitca12cf5ac9c8fcbf64bc18e0dc2974dc3217f97d (patch)
treef2c2aef1940782890d88ff1dfedc3745a7d71799
parent5a450eb388d5c262a1c938a0b5cebb24800a03b2 (diff)
downloadlinux-sh-ca12cf5ac9c8fcbf64bc18e0dc2974dc3217f97d.tar.gz
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 <richardcochran@gmail.com> Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
index 819097d9b583..43f97601b500 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;