i40evf: Fix link up issue when queues are disabled

One of the previous patch fixes the link up issue by ignoring it if
i40evf is not in __I40EVF_RUNNING state. However this doesn't fix the
race condition when queues are disabled esp for ADq on VF. Hence check
if all queues are enabled before starting all queues.

Signed-off-by: Avinash Dayanand <avinash.dayanand@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf.h b/drivers/net/ethernet/intel/i40evf/i40evf.h
index b6991e8..89ce2f9 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40evf.h
+++ b/drivers/net/ethernet/intel/i40evf/i40evf.h
@@ -240,6 +240,7 @@ struct i40evf_adapter {
 #define I40EVF_FLAG_ALLMULTI_ON                        BIT(14)
 #define I40EVF_FLAG_LEGACY_RX                  BIT(15)
 #define I40EVF_FLAG_REINIT_ITR_NEEDED          BIT(16)
+#define I40EVF_FLAG_QUEUES_DISABLED            BIT(17)
 /* duplicates for common code */
 #define I40E_FLAG_DCB_ENABLED                  0
 #define I40E_FLAG_RX_CSUM_ENABLED              I40EVF_FLAG_RX_CSUM_ENABLED

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_main.c b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
index 34fd6c5..0776b07 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40evf_main.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_main.c
@@ -1913,6 +1913,7 @@ continue_reset:
        i40evf_free_all_rx_resources(adapter);
        i40evf_free_all_tx_resources(adapter);
 
+       adapter->flags |= I40EVF_FLAG_QUEUES_DISABLED;
        /* kill and reinit the admin queue */
        i40evf_shutdown_adminq(hw);
        adapter->current_op = VIRTCHNL_OP_UNKNOWN;

diff --git a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c
index 0700f0a..e8dcc31 100644 (file)
--- a/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c
+++ b/drivers/net/ethernet/intel/i40evf/i40evf_virtchnl.c
@@ -1017,14 +1017,25 @@ void i40evf_virtchnl_completion(struct i40evf_adapter *adapter,
                        if (adapter->link_up == link_up)
                                break;
 
-                       /* If we get link up message and start queues before
-                        * our queues are configured it will trigger a TX hang.
-                        * In that case, just ignore the link status message,
-                        * we'll get another one after we enable queues and
-                        * actually prepared to send traffic.
-                        */
-                       if (link_up && adapter->state != __I40EVF_RUNNING)
-                               break;
+                       if (link_up) {
+                               /* If we get link up message and start queues
+                                * before our queues are configured it will
+                                * trigger a TX hang. In that case, just ignore
+                                * the link status message,we'll get another one
+                                * after we enable queues and actually prepared
+                                * to send traffic.
+                                */
+                               if (adapter->state != __I40EVF_RUNNING)
+                                       break;
+
+                               /* For ADq enabled VF, we reconfigure VSIs and
+                                * re-allocate queues. Hence wait till all
+                                * queues are enabled.
+                                */
+                               if (adapter->flags &
+                                   I40EVF_FLAG_QUEUES_DISABLED)
+                                       break;
+                       }
 
                        adapter->link_up = link_up;
                        if (link_up) {
@@ -1108,6 +1119,7 @@ void i40evf_virtchnl_completion(struct i40evf_adapter *adapter,
        case VIRTCHNL_OP_ENABLE_QUEUES:
                /* enable transmits */
                i40evf_irq_enable(adapter, true);
+               adapter->flags &= ~I40EVF_FLAG_QUEUES_DISABLED;
                break;
        case VIRTCHNL_OP_DISABLE_QUEUES:
                i40evf_free_all_tx_resources(adapter);