net/nfp: fix DMA error after abnormal exit

[ upstream commit 9e442599802e788874110339901f4eeb8f0ecc3b ]

When DPDK application exit abnormally, there might have DMA error,
and which will cause the load of firmware failed.

Fix this by force the physical port down to clear the possible DMA error.

Fixes: 896c265 ("net/nfp: use new CPP interface")

Signed-off-by: Shihong Wang <shihong.wang@corigine.com>
Signed-off-by: Peng Zhang <peng.zhang@corigine.com>
Reviewed-by: Chaoyong He <chaoyong.he@corigine.com>

drivers/net/nfp/nfp_net.c

@@ -3662,6 +3662,7 @@ static int nfp_pf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
 	int ret = -ENODEV;
 	int err;
 	int i;
+	uint32_t j;
 
 	if (!dev)
 		return ret;
@@ -3696,6 +3697,10 @@ static int nfp_pf_pci_probe(struct rte_pci_driver *pci_drv __rte_unused,
 		return -EIO;
 	}
 
+	/* Force the physical port down to clear the possible DMA error */
+	for (j = 0; j < nfp_eth_table->count; j++)
+		nfp_eth_set_configured(cpp, nfp_eth_table->ports[j].index, 0);
+
 	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
 		if (nfp_fw_setup(dev, cpp, nfp_eth_table, hwinfo)) {
 			PMD_DRV_LOG(INFO, "Error when uploading firmware");