net/bnxt: fix writing MTU to FW

[ upstream commit 8d7bdc8 ]

We are currently writing the MAX supported MTU size even though
the MTU passed by the application is a different value.
Configure the application specified MTU instead.

Fixes: b7778e8 ("net/bnxt: refactor to properly allocate resources for PF/VF")

Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>

drivers/net/bnxt/bnxt_hwrm.c

@@ -2529,7 +2529,8 @@ static int bnxt_hwrm_pf_func_cfg(struct bnxt *bp, int tx_rings)
 			HWRM_FUNC_CFG_INPUT_ENABLES_NUM_VNICS |
 			HWRM_FUNC_CFG_INPUT_ENABLES_NUM_HW_RING_GRPS);
 	req.flags = rte_cpu_to_le_32(bp->pf.func_cfg_flags);
-	req.mtu = rte_cpu_to_le_16(BNXT_MAX_MTU);
+	req.mtu = rte_cpu_to_le_16(RTE_MIN(bp->eth_dev->data->mtu,
+					   BNXT_MAX_MTU)); //FW adds hdr sizes
 	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);