path: root/drivers/net/ethernet/mellanox/mlx5/core
diff options
authorJacob Keller <jacob.e.keller@intel.com>2019-11-14 10:44:56 -0800
committerDavid S. Miller <davem@davemloft.net>2019-11-15 12:48:32 -0800
commit7f9048f1df6f0c1c7a74a15c8b4ce033a753f274 (patch)
tree62992eac0298f48998de3edcc55b26ac9ee9879f /drivers/net/ethernet/mellanox/mlx5/core
parentptp: Validate requests to enable time stamping of external signals. (diff)
net: reject PTP periodic output requests with unsupported flags
Commit 823eb2a3c4c7 ("PTP: add support for one-shot output") introduced a new flag for the PTP periodic output request ioctl. This flag is not currently supported by any driver. Fix all drivers which implement the periodic output request ioctl to explicitly reject any request with flags they do not understand. This ensures that the driver does not accidentally misinterpret the PTP_PEROUT_ONE_SHOT flag, or any new flag introduced in the future. This is important for forward compatibility: if a new flag is introduced, the driver should reject requests to enable the flag until the driver has actually been modified to support the flag in question. Cc: Felipe Balbi <felipe.balbi@linux.intel.com> Cc: David S. Miller <davem@davemloft.net> Cc: Christopher Hall <christopher.s.hall@intel.com> Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Signed-off-by: Richard Cochran <richardcochran@gmail.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Reviewed-by: Saeed Mahameed <saeedm@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core')
1 files changed, 4 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 0059b290e095..cff6b60de304 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/clock.c
@@ -290,6 +290,10 @@ static int mlx5_perout_configure(struct ptp_clock_info *ptp,
if (!MLX5_PPS_CAP(mdev))
+ /* Reject requests with unsupported flags */
+ if (rq->perout.flags)
+ return -EOPNOTSUPP;
if (rq->perout.index >= clock->ptp_info.n_pins)
return -EINVAL;