ice: Fix interrupt moderation settings getting cleared

Adaptive-rx and Adaptive-tx are interrupt moderation settings
that can be enabled/disabled using ethtool:
ethtool -C ethX adaptive-rx on/off adaptive-tx on/off

Unfortunately those settings are getting cleared after
changing number of queues, or in ethtool world 'channels':
ethtool -L ethX rx 1 tx 1

Clearing was happening due to introduction of bit fields
in ice_ring_container struct. This way only itr_setting
bits were rebuilt during ice_vsi_rebuild_set_coalesce().

Introduce an anonymous struct of bitfields and create a
union to refer to them as a single variable.
This way variable can be easily saved and restored.

Fixes: 61dc79ced7aa ("ice: Restore interrupt throttle settings after VSI rebuild")
Signed-off-by: Michal Wilczynski <michal.wilczynski@intel.com>
Tested-by: Gurucharan <gurucharanx.g@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 6d19c58..454e01a 100644 (file)
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -3043,8 +3043,8 @@ ice_vsi_rebuild_get_coalesce(struct ice_vsi *vsi,
        ice_for_each_q_vector(vsi, i) {
                struct ice_q_vector *q_vector = vsi->q_vectors[i];
 
-               coalesce[i].itr_tx = q_vector->tx.itr_setting;
-               coalesce[i].itr_rx = q_vector->rx.itr_setting;
+               coalesce[i].itr_tx = q_vector->tx.itr_settings;
+               coalesce[i].itr_rx = q_vector->rx.itr_settings;
                coalesce[i].intrl = q_vector->intrl;
 
                if (i < vsi->num_txq)
@@ -3100,21 +3100,21 @@ ice_vsi_rebuild_set_coalesce(struct ice_vsi *vsi,
                 */
                if (i < vsi->alloc_rxq && coalesce[i].rx_valid) {
                        rc = &vsi->q_vectors[i]->rx;
-                       rc->itr_setting = coalesce[i].itr_rx;
+                       rc->itr_settings = coalesce[i].itr_rx;
                        ice_write_itr(rc, rc->itr_setting);
                } else if (i < vsi->alloc_rxq) {
                        rc = &vsi->q_vectors[i]->rx;
-                       rc->itr_setting = coalesce[0].itr_rx;
+                       rc->itr_settings = coalesce[0].itr_rx;
                        ice_write_itr(rc, rc->itr_setting);
                }
 
                if (i < vsi->alloc_txq && coalesce[i].tx_valid) {
                        rc = &vsi->q_vectors[i]->tx;
-                       rc->itr_setting = coalesce[i].itr_tx;
+                       rc->itr_settings = coalesce[i].itr_tx;
                        ice_write_itr(rc, rc->itr_setting);
                } else if (i < vsi->alloc_txq) {
                        rc = &vsi->q_vectors[i]->tx;
-                       rc->itr_setting = coalesce[0].itr_tx;
+                       rc->itr_settings = coalesce[0].itr_tx;
                        ice_write_itr(rc, rc->itr_setting);
                }
 
@@ -3128,12 +3128,12 @@ ice_vsi_rebuild_set_coalesce(struct ice_vsi *vsi,
        for (; i < vsi->num_q_vectors; i++) {
                /* transmit */
                rc = &vsi->q_vectors[i]->tx;
-               rc->itr_setting = coalesce[0].itr_tx;
+               rc->itr_settings = coalesce[0].itr_tx;
                ice_write_itr(rc, rc->itr_setting);
 
                /* receive */
                rc = &vsi->q_vectors[i]->rx;
-               rc->itr_setting = coalesce[0].itr_rx;
+               rc->itr_settings = coalesce[0].itr_rx;
                ice_write_itr(rc, rc->itr_setting);
 
                vsi->q_vectors[i]->intrl = coalesce[0].intrl;

diff --git a/drivers/net/ethernet/intel/ice/ice_txrx.h b/drivers/net/ethernet/intel/ice/ice_txrx.h
index cead3eb..ffb3f6a 100644 (file)
--- a/drivers/net/ethernet/intel/ice/ice_txrx.h
+++ b/drivers/net/ethernet/intel/ice/ice_txrx.h
@@ -384,9 +384,14 @@ struct ice_ring_container {
        /* this matches the maximum number of ITR bits, but in usec
         * values, so it is shifted left one bit (bit zero is ignored)
         */
-       u16 itr_setting:13;
-       u16 itr_reserved:2;
-       u16 itr_mode:1;
+       union {
+               struct {
+                       u16 itr_setting:13;
+                       u16 itr_reserved:2;
+                       u16 itr_mode:1;
+               };
+               u16 itr_settings;
+       };
        enum ice_container_type type;
 };