i40e: Fix the Tx ring qset handle when DCB reconfigures

When DCB is reconfigured to single TC the driver did not reset the
Tx ring Qset handle to the correct mapping; which caused Tx queue
disable timeouts.

Change-ID: I4da5915ec92a83c281b478d653fae6ef1b72edfe
Signed-off-by: Neerav Parikh <neerav.parikh@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index a926e3b..bd4494d 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -2689,8 +2689,15 @@ static void i40e_vsi_config_dcb_rings(struct i40e_vsi *vsi)
        u16 qoffset, qcount;
        int i, n;
 
-       if (!(vsi->back->flags & I40E_FLAG_DCB_ENABLED))
-               return;
+       if (!(vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
+               /* Reset the TC information */
+               for (i = 0; i < vsi->num_queue_pairs; i++) {
+                       rx_ring = vsi->rx_rings[i];
+                       tx_ring = vsi->tx_rings[i];
+                       rx_ring->dcb_tc = 0;
+                       tx_ring->dcb_tc = 0;
+               }
+       }
 
        for (n = 0; n < I40E_MAX_TRAFFIC_CLASS; n++) {
                if (!(vsi->tc_config.enabled_tc & (1 << n)))