diff options
| author | Nicolas Pitre <nicolas.pitre@linaro.org> | 2016-09-21 02:25:58 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-09-22 09:18:33 +0300 |
| commit | efee95f42b5dddedcaff0a0eaa44e170fc7522e8 (patch) | |
| tree | e5d83b374d57e1bced53af0345db98f0f6cd4373 /drivers/net/ethernet/mellanox/mlx4/en_clock.c | |
| parent | d270f76c2d6ee3d96cfb1affb78a3d536e0b8fd6 (diff) | |
| download | linux-efee95f42b5dddedcaff0a0eaa44e170fc7522e8.tar.xz | |
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 <nico@linaro.org>
Reviewed-by: Eugenia Emantayev <eugenia@mellanox.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/en_clock.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/en_clock.c | 2 |
1 files changed, 1 insertions, 1 deletions
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"); } |