[Intel-wired-lan] [PATCH net v2] i40e: Fix incorrect netdev's real number of RX/TX queues

[Jedrzej Jagielski]

There was a wrong queues representation in sysfs during
driver's reinitialization in case of online cpus number is
less than combined queues. It was caused by stopped
NetworkManager, which is responsible for calling vsi_open
function during driver's initialization.
In specific situation (ex. 12 cpus online) there were 16 queues
in /sys/class/net/<iface>/queues. In case of modifying queues with
value higher, than number of online cpus, then it caused write
errors and other errors.
Add updating of sysfs's queues representation during driver
initialization.

Fixes: 41c445ff0f48 ("i40e: main driver core")
Signed-off-by: Lukasz Cieplicki <lukaszx.cieplicki at intel.com>
Signed-off-by: Jedrzej Jagielski <jedrzej.jagielski at intel.com>
---
v2:Fix "CHECK: Lines should not end with a '('" warning
---
 drivers/net/ethernet/intel/i40e/i40e_main.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index 4ff1c9b9217b..1b6f03cc41da 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -14074,6 +14074,22 @@ static struct i40e_vsi *i40e_vsi_reinit_setup(struct i40e_vsi *vsi)
 	return NULL;
 }
 
+/**
+ * i40e_netif_set_realnum_tx_rx_queues - Update number of tx/rx queues
+ * @vsi: vsi structure
+ *
+ * This updates netdev's number of tx/rx queues
+ *
+ * Returns status of setting tx/rx queues
+ **/
+static int i40e_netif_set_realnum_tx_rx_queues(struct i40e_vsi *vsi)
+{
+	netif_set_real_num_rx_queues(vsi->netdev, vsi->num_queue_pairs);
+
+	return netif_set_real_num_tx_queues(vsi->netdev,
+					    vsi->num_queue_pairs);
+}
+
 /**
  * i40e_vsi_setup - Set up a VSI by a given type
  * @pf: board private structure
@@ -14203,6 +14219,9 @@ struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf, u8 type,
 	case I40E_VSI_MAIN:
 	case I40E_VSI_VMDQ2:
 		ret = i40e_config_netdev(vsi);
+		if (ret)
+			goto err_netdev;
+		ret = i40e_netif_set_realnum_tx_rx_queues(vsi);
 		if (ret)
 			goto err_netdev;
 		ret = register_netdev(vsi->netdev);
-- 
2.27.0