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>

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
index 4ab4ebba07a18e5b1b0539cf0c0b8a7122f6fdc2..94eff4a269e69acc5da159a0d05467821f095ff5 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -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);