From efee95f42b5dddedcaff0a0eaa44e170fc7522e8 Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Tue, 20 Sep 2016 19:25:58 -0400 Subject: ptp_clock: future-proofing drivers against PTP subsystem becoming optional Drivers must be ready to accept NULL from ptp_clock_register() if the PTP clock subsystem is configured out. This patch documents that and ensures that all drivers cope well with a NULL return. Signed-off-by: Nicolas Pitre Reviewed-by: Eugenia Emantayev Acked-by: Richard Cochran Acked-by: Edward Cree Signed-off-by: David S. Miller --- drivers/net/ethernet/mellanox/mlx4/en_clock.c | 2 +- drivers/net/ethernet/mellanox/mlx5/core/en_clock.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/net/ethernet/mellanox') diff --git a/drivers/net/ethernet/mellanox/mlx4/en_clock.c b/drivers/net/ethernet/mellanox/mlx4/en_clock.c index 1494997c4f7e..08fc5fc56d43 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_clock.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_clock.c @@ -298,7 +298,7 @@ void mlx4_en_init_timestamp(struct mlx4_en_dev *mdev) if (IS_ERR(mdev->ptp_clock)) { mdev->ptp_clock = NULL; mlx4_err(mdev, "ptp_clock_register failed\n"); - } else { + } else if (mdev->ptp_clock) { mlx4_info(mdev, "registered PHC clock\n"); } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_clock.c b/drivers/net/ethernet/mellanox/mlx5/core/en_clock.c index 847a8f3ac2b2..13dc388667b6 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_clock.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_clock.c @@ -273,7 +273,7 @@ void mlx5e_timestamp_init(struct mlx5e_priv *priv) tstamp->ptp = ptp_clock_register(&tstamp->ptp_info, &priv->mdev->pdev->dev); - if (IS_ERR_OR_NULL(tstamp->ptp)) { + if (IS_ERR(tstamp->ptp)) { mlx5_core_warn(priv->mdev, "ptp_clock_register failed %ld\n", PTR_ERR(tstamp->ptp)); tstamp->ptp = NULL; -- cgit v1.2.1