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i40e: fix XPS mask when resetting

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During resets (possibly caused by a Tx hang) the driver would
accidentally clear the XPS mask for all queues back to 0.

This caused higher CPU utilization and had some other performance impacts
for transmit tests.

Change-ID: I95f112432c9e643a153eaa31cd28cdcbfdd01831
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Jesse Brandeburg 2015-02-26 16:13:22 +00:00 committed by Jeff Kirsher
parent ce7ca75176
commit 9a660eeae2
1 changed files with 11 additions and 11 deletions
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22
drivers/net/ethernet/intel/i40e/i40e_main.c
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@ -2399,20 +2399,20 @@ static void i40e_config_xps_tx_ring(struct i40e_ring *ring)
struct i40e_vsi *vsi = ring->vsi;
cpumask_var_t mask;
if (ring->q_vector && ring->netdev) {
/* Single TC mode enable XPS */
if (vsi->tc_config.numtc <= 1 &&
!test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state)) {
if (!ring->q_vector || !ring->netdev)
return;
/* Single TC mode enable XPS */
if (vsi->tc_config.numtc <= 1) {
if (!test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state))
netif_set_xps_queue(ring->netdev,
&ring->q_vector->affinity_mask,
ring->queue_index);
} else if (alloc_cpumask_var(&mask, GFP_KERNEL)) {
/* Disable XPS to allow selection based on TC */
bitmap_zero(cpumask_bits(mask), nr_cpumask_bits);
netif_set_xps_queue(ring->netdev, mask,
ring->queue_index);
free_cpumask_var(mask);
}
} else if (alloc_cpumask_var(&mask, GFP_KERNEL)) {
/* Disable XPS to allow selection based on TC */
bitmap_zero(cpumask_bits(mask), nr_cpumask_bits);
netif_set_xps_queue(ring->netdev, mask, ring->queue_index);
free_cpumask_var(mask);
}
}