Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2023-07-14 (ice)

This series contains updates to ice driver only.

Petr Oros removes multiple calls made to unregister netdev and
devlink_port.

Michal fixes null pointer dereference that can occur during reload.
====================

Link: https://lore.kernel.org/r/20230714201041.1717834-1-anthony.l.nguyen@intel.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

4 files changed, 21 insertions, 31 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_base.c b/drivers/net/ethernet/intel/ice/ice_base.c
index 4a12316f7b46..b678bdf96f3a 100644
--- a/drivers/net/ethernet/intel/ice/ice_base.c
+++ b/drivers/net/ethernet/intel/ice/ice_base.c
@@ -800,6 +800,8 @@ void ice_vsi_free_q_vectors(struct ice_vsi *vsi)
 
 	ice_for_each_q_vector(vsi, v_idx)
 		ice_free_q_vector(vsi, v_idx);
+
+	vsi->num_q_vectors = 0;
 }
 
 /**
diff --git a/drivers/net/ethernet/intel/ice/ice_ethtool.c b/drivers/net/ethernet/intel/ice/ice_ethtool.c
index 8d5cbbd0b3d5..ad4d4702129f 100644
--- a/drivers/net/ethernet/intel/ice/ice_ethtool.c
+++ b/drivers/net/ethernet/intel/ice/ice_ethtool.c
@@ -2681,8 +2681,13 @@ ice_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring,
 
 	ring->rx_max_pending = ICE_MAX_NUM_DESC;
 	ring->tx_max_pending = ICE_MAX_NUM_DESC;
-	ring->rx_pending = vsi->rx_rings[0]->count;
-	ring->tx_pending = vsi->tx_rings[0]->count;
+	if (vsi->tx_rings && vsi->rx_rings) {
+		ring->rx_pending = vsi->rx_rings[0]->count;
+		ring->tx_pending = vsi->tx_rings[0]->count;
+	} else {
+		ring->rx_pending = 0;
+		ring->tx_pending = 0;
+	}
 
 	/* Rx mini and jumbo rings are not supported */
 	ring->rx_mini_max_pending = 0;
@@ -2716,6 +2721,10 @@ ice_set_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring,
 		return -EINVAL;
 	}
 
+	/* Return if there is no rings (device is reloading) */
+	if (!vsi->tx_rings || !vsi->rx_rings)
+		return -EBUSY;
+
 	new_tx_cnt = ALIGN(ring->tx_pending, ICE_REQ_DESC_MULTIPLE);
 	if (new_tx_cnt != ring->tx_pending)
 		netdev_info(netdev, "Requested Tx descriptor count rounded up to %d\n",
diff --git a/drivers/net/ethernet/intel/ice/ice_lib.c b/drivers/net/ethernet/intel/ice/ice_lib.c
index 00e3afd507a4..0054d7e64ec3 100644
--- a/drivers/net/ethernet/intel/ice/ice_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_lib.c
@@ -2972,39 +2972,12 @@ int ice_vsi_release(struct ice_vsi *vsi)
 		return -ENODEV;
 	pf = vsi->back;
 
-	/* do not unregister while driver is in the reset recovery pending
-	 * state. Since reset/rebuild happens through PF service task workqueue,
-	 * it's not a good idea to unregister netdev that is associated to the
-	 * PF that is running the work queue items currently. This is done to
-	 * avoid check_flush_dependency() warning on this wq
-	 */
-	if (vsi->netdev && !ice_is_reset_in_progress(pf->state) &&
-	    (test_bit(ICE_VSI_NETDEV_REGISTERED, vsi->state))) {
-		unregister_netdev(vsi->netdev);
-		clear_bit(ICE_VSI_NETDEV_REGISTERED, vsi->state);
-	}
-
-	if (vsi->type == ICE_VSI_PF)
-		ice_devlink_destroy_pf_port(pf);
-
 	if (test_bit(ICE_FLAG_RSS_ENA, pf->flags))
 		ice_rss_clean(vsi);
 
 	ice_vsi_close(vsi);
 	ice_vsi_decfg(vsi);
 
-	if (vsi->netdev) {
-		if (test_bit(ICE_VSI_NETDEV_REGISTERED, vsi->state)) {
-			unregister_netdev(vsi->netdev);
-			clear_bit(ICE_VSI_NETDEV_REGISTERED, vsi->state);
-		}
-		if (test_bit(ICE_VSI_NETDEV_ALLOCD, vsi->state)) {
-			free_netdev(vsi->netdev);
-			vsi->netdev = NULL;
-			clear_bit(ICE_VSI_NETDEV_ALLOCD, vsi->state);
-		}
-	}
-
 	/* retain SW VSI data structure since it is needed to unregister and
 	 * free VSI netdev when PF is not in reset recovery pending state,\
 	 * for ex: during rmmod.
diff --git a/drivers/net/ethernet/intel/ice/ice_main.c b/drivers/net/ethernet/intel/ice/ice_main.c
index 19a5e7f3a075..f02d44455772 100644
--- a/drivers/net/ethernet/intel/ice/ice_main.c
+++ b/drivers/net/ethernet/intel/ice/ice_main.c
@@ -4430,9 +4430,9 @@ static int ice_start_eth(struct ice_vsi *vsi)
 	if (err)
 		return err;
 
-	rtnl_lock();
 	err = ice_vsi_open(vsi);
-	rtnl_unlock();
+	if (err)
+		ice_fltr_remove_all(vsi);
 
 	return err;
 }
@@ -4895,6 +4895,7 @@ int ice_load(struct ice_pf *pf)
 	params = ice_vsi_to_params(vsi);
 	params.flags = ICE_VSI_FLAG_INIT;
 
+	rtnl_lock();
 	err = ice_vsi_cfg(vsi, &params);
 	if (err)
 		goto err_vsi_cfg;
@@ -4902,6 +4903,7 @@ int ice_load(struct ice_pf *pf)
 	err = ice_start_eth(ice_get_main_vsi(pf));
 	if (err)
 		goto err_start_eth;
+	rtnl_unlock();
 
 	err = ice_init_rdma(pf);
 	if (err)
@@ -4916,9 +4918,11 @@ int ice_load(struct ice_pf *pf)
 
 err_init_rdma:
 	ice_vsi_close(ice_get_main_vsi(pf));
+	rtnl_lock();
 err_start_eth:
 	ice_vsi_decfg(ice_get_main_vsi(pf));
 err_vsi_cfg:
+	rtnl_unlock();
 	ice_deinit_dev(pf);
 	return err;
 }
@@ -4931,8 +4935,10 @@ void ice_unload(struct ice_pf *pf)
 {
 	ice_deinit_features(pf);
 	ice_deinit_rdma(pf);
+	rtnl_lock();
 	ice_stop_eth(ice_get_main_vsi(pf));
 	ice_vsi_decfg(ice_get_main_vsi(pf));
+	rtnl_unlock();
 	ice_deinit_dev(pf);
 }