diff options
| author |   Shawn Bohrer <sbohrer@rgmadvisors.com> | 2013-12-31 11:39:40 -0600 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2014-01-02 03:30:36 -0500 |
| commit | 2156d9a8ac0202f0158d407063cb850afffd3f56 (patch) | |
| tree | ee54f3bc45192eac61f4c194756405e46a942638 /drivers/net/ethernet/mellanox/mlx4/en_clock.c | |
| parent | mlx4_en: Add PTP hardware clock (diff) | |
| download | linux-dev-2156d9a8ac0202f0158d407063cb850afffd3f56.tar.xz linux-dev-2156d9a8ac0202f0158d407063cb850afffd3f56.zip | |
mlx4_en: Only cycle port if HW timestamp config changes
If the hwtstamp_config matches what is currently set for the device then
simply return. Without this change any program that tries to enable
hardware timestamps will cause the link to cycle even if hardware
timstamps were already enabled.
Signed-off-by: Shawn Bohrer <sbohrer@rgmadvisors.com>
Acked-By: Hadar Hen Zion <hadarh@mellanox.com>
Acked-by: Richard Cochran <richardcochran@gmail.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 | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_clock.c b/drivers/net/ethernet/mellanox/mlx4/en_clock.c index 30712b36f43c..abaf6bb22416 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_clock.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_clock.c @@ -42,6 +42,10 @@ int mlx4_en_timestamp_config(struct net_device *dev, int tx_type, int rx_filter) int port_up = 0; int err = 0; + if (priv->hwtstamp_config.tx_type == tx_type && + priv->hwtstamp_config.rx_filter == rx_filter) + return 0; + mutex_lock(&mdev->state_lock); if (priv->port_up) { port_up = 1; |