evie/android_kernel_oneplus_msm8998
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mlx4_en: Only cycle port if HW timestamp config changes

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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>
This commit is contained in:
Shawn Bohrer 2013-12-31 11:39:40 -06:00 • committed by David S. Miller
parent ad7d4eaed9
commit 2156d9a8ac
1 changed files with 4 additions and 0 deletions
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4
drivers/net/ethernet/mellanox/mlx4/en_clock.c
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@ -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;