Commit 973371da authored Apr 27, 2015 by Mitch Williams Committed by Jeff Kirsher Jul 14, 2015

i40evf: Allow for an abundance of vectors

The driver currently only maps TX and RX queues to a single MSI-X vector
per queue pair if there are exactly enough vectors for this.
Unfortunately, if we have too many vectors it will fail and allocate
queues to vectors in a suboptimal manner. Change the condition check to
allow for excess vectors. In this case, the extras just won't be used.

Change-ID: I23e1e2955c64739c86612db88a25583e6a7e0b17
Signed-off-by: Mitch Williams <mitch.a.williams@intel.com>
Tested-by: Jim Young <james.m.young@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

parent 489ce7a4

drivers/net/ethernet/intel/i40evf/i40evf_main.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -406,7 +406,7 @@ static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
		/* The ideal configuration...
		* We have enough vectors to map one per queue.
		*/
		if (q_vectors == (rxr_remaining * 2)) {
		if (q_vectors >= (rxr_remaining * 2)) {
		for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
		i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);