[PATCH v3 3/8] net: thunderx: make CFG_DONE message to run through generic send-ack sequence

[Vadim Lomovtsev]

At the end of NIC VF initialization VF sends CFG_DONE message to PF without
using nicvf_msg_send_to_pf routine. This potentially could re-write data in
mailbox. This commit is to implement common way of sending CFG_DONE message
by the same way with other configuration messages by using
nicvf_send_msg_to_pf() routine.

Signed-off-by: Vadim Lomovtsev <vlomovt...@marvell.com>
---
 drivers/net/ethernet/cavium/thunder/nic_main.c   |  2 +-
 drivers/net/ethernet/cavium/thunder/nicvf_main.c | 15 ++++++++++++---
 2 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/cavium/thunder/nic_main.c 
b/drivers/net/ethernet/cavium/thunder/nic_main.c
index 6c8dcb65ff03..90497a27df18 100644
--- a/drivers/net/ethernet/cavium/thunder/nic_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nic_main.c
@@ -1039,7 +1039,7 @@ static void nic_handle_mbx_intr(struct nicpf *nic, int vf)
        case NIC_MBOX_MSG_CFG_DONE:
                /* Last message of VF config msg sequence */
                nic_enable_vf(nic, vf, true);
-               goto unlock;
+               break;
        case NIC_MBOX_MSG_SHUTDOWN:
                /* First msg in VF teardown sequence */
                if (vf >= nic->num_vf_en)
diff --git a/drivers/net/ethernet/cavium/thunder/nicvf_main.c 
b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
index abf24e7dff2d..19b58fc3ca41 100644
--- a/drivers/net/ethernet/cavium/thunder/nicvf_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nicvf_main.c
@@ -169,6 +169,17 @@ static int nicvf_check_pf_ready(struct nicvf *nic)
        return 1;
 }
 
+static void nicvf_send_cfg_done(struct nicvf *nic)
+{
+       union nic_mbx mbx = {};
+
+       mbx.msg.msg = NIC_MBOX_MSG_CFG_DONE;
+       if (nicvf_send_msg_to_pf(nic, &mbx)) {
+               netdev_err(nic->netdev,
+                          "PF didn't respond to CFG DONE msg\n");
+       }
+}
+
 static void nicvf_read_bgx_stats(struct nicvf *nic, struct bgx_stats_msg *bgx)
 {
        if (bgx->rx)
@@ -1416,7 +1427,6 @@ int nicvf_open(struct net_device *netdev)
        struct nicvf *nic = netdev_priv(netdev);
        struct queue_set *qs = nic->qs;
        struct nicvf_cq_poll *cq_poll = NULL;
-       union nic_mbx mbx = {};
 
        /* wait till all queued set_rx_mode tasks completes if any */
        drain_workqueue(nic->nicvf_rx_mode_wq);
@@ -1515,8 +1525,7 @@ int nicvf_open(struct net_device *netdev)
                nicvf_enable_intr(nic, NICVF_INTR_RBDR, qidx);
 
        /* Send VF config done msg to PF */
-       mbx.msg.msg = NIC_MBOX_MSG_CFG_DONE;
-       nicvf_write_to_mbx(nic, &mbx);
+       nicvf_send_cfg_done(nic);
 
        return 0;
 cleanup:
-- 
2.17.2