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ixgbe: Do not schedule an uninitialized workqueue entry

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If a hardware Tx timestamp is requested, an uninitialized
workqueue entry may be scheduled, especially on an 82598 adapter.
Add a check for a PTP clock to avoid that. Also only apply the
unlikely to the first term of the conditional. That will make the
rest of the checks be in the cold path.

Signed-off-by: Mark Rustad <mark.d.rustad@intel.com>
Acked-by: Matthew Vick <matthew.vick@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Mark Rustad 2014-08-09 07:02:09 +00:00 committed by Jeff Kirsher
parent d38e92481b
commit d523493373
1 changed files with 4 additions and 3 deletions
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7
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
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@ -7108,9 +7108,10 @@ netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
}
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
!test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS,
&adapter->state))) {
if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
adapter->ptp_clock &&
!test_and_set_bit_lock(__IXGBE_PTP_TX_IN_PROGRESS,
&adapter->state)) {
skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
tx_flags |= IXGBE_TX_FLAGS_TSTAMP;