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i40evf: program RSS LUT correctly

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A recent change broke the RSS LUT programming, causing it to be
programmed with all 0. Correct this by actually assigning the
incremented value back to the counter variable so that the increment
will be remembered by the calling function.

While we're at it, add a proper kernel-doc function comment to our
helper function.

Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Mitch A Williams 2014-03-28 06:49:02 +00:00 committed by Jeff Kirsher
parent fe6d4aa437
commit 5b7af02c26
1 changed files with 16 additions and 4 deletions
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20
drivers/net/ethernet/intel/i40evf/i40evf_main.c
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@ -1412,6 +1412,14 @@ restart_watchdog:
schedule_work(&adapter->adminq_task);
}
/**
* i40evf_configure_rss - increment to next available tx queue
* @adapter: board private structure
* @j: queue counter
*
* Helper function for RSS programming to increment through available
* queus. Returns the next queue value.
**/
static int next_queue(struct i40evf_adapter *adapter, int j)
{
j += 1;
@ -1451,10 +1459,14 @@ static void i40evf_configure_rss(struct i40evf_adapter *adapter)
/* Populate the LUT with max no. of queues in round robin fashion */
j = adapter->vsi_res->num_queue_pairs;
for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
lut = next_queue(adapter, j);
lut |= next_queue(adapter, j) << 8;
lut |= next_queue(adapter, j) << 16;
lut |= next_queue(adapter, j) << 24;
j = next_queue(adapter, j);
lut = j;
j = next_queue(adapter, j);
lut |= j << 8;
j = next_queue(adapter, j);
lut |= j << 16;
j = next_queue(adapter, j);
lut |= j << 24;
wr32(hw, I40E_VFQF_HLUT(i), lut);
}
i40e_flush(hw);