[dpdk-dev] [PATCH 2/3] net/bnxt: fix jumbo frame configuration in firmware

[Ajit Khaparde <ajit.khaparde@broadcom.com>]

From: Rahul Gupta <rahul.gupta@broadcom.com>

In order to prevent reconfiguration of firmware resources for every
MTU change, configure FW with max MTU value using hwrm_func_cfg
to support all frame sizes. There is no need to overwrite the driver
level MTU variable data->mtu with the FW MTU.

Fixes: 905cd45ce30e ("net/bnxt: use configured MTU during load")
Cc: stable@dpdk.org

Signed-off-by: Rahul Gupta <rahul.gupta@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
---
 drivers/net/bnxt/bnxt_ethdev.c | 4 ----
 drivers/net/bnxt/bnxt_hwrm.c   | 3 +--
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/drivers/net/bnxt/bnxt_ethdev.c b/drivers/net/bnxt/bnxt_ethdev.c
index 06033e3b8..b1e831b87 100644
--- a/drivers/net/bnxt/bnxt_ethdev.c
+++ b/drivers/net/bnxt/bnxt_ethdev.c
@@ -4582,10 +4582,6 @@ static int bnxt_init_fw(struct bnxt *bp)
 	if (rc)
 		bp->flags &= ~BNXT_FLAG_FW_CAP_ERROR_RECOVERY;
 
-	if (mtu >= RTE_ETHER_MIN_MTU && mtu <= BNXT_MAX_MTU &&
-	    mtu != bp->eth_dev->data->mtu)
-		bp->eth_dev->data->mtu = mtu;
-
 	bnxt_hwrm_port_led_qcaps(bp);
 
 	return 0;
diff --git a/drivers/net/bnxt/bnxt_hwrm.c b/drivers/net/bnxt/bnxt_hwrm.c
index 1d3732eee..41730089b 100644
--- a/drivers/net/bnxt/bnxt_hwrm.c
+++ b/drivers/net/bnxt/bnxt_hwrm.c
@@ -2978,8 +2978,7 @@ static int bnxt_hwrm_pf_func_cfg(struct bnxt *bp, int tx_rings)
 	}
 
 	req.flags = rte_cpu_to_le_32(bp->pf.func_cfg_flags);
-	req.mtu = rte_cpu_to_le_16(RTE_MIN(bp->eth_dev->data->mtu,
-					   BNXT_MAX_MTU)); //FW adds hdr sizes
+	req.mtu = rte_cpu_to_le_16(BNXT_MAX_MTU);
 	req.mru = rte_cpu_to_le_16(BNXT_VNIC_MRU(bp->eth_dev->data->mtu));
 	req.num_rsscos_ctxs = rte_cpu_to_le_16(bp->max_rsscos_ctx);
 	req.num_stat_ctxs = rte_cpu_to_le_16(bp->max_stat_ctx);
-- 
2.21.0 (Apple Git-122.2)