[PATCH 21.11] net/nfp: fix DMA error after abnormal exit

[Chaoyong He <chaoyong.he@corigine.com>]

[ 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: 896c265ef954 ("net/nfp: use new CPP interface")

Signed-off-by: Shihong Wang <shihong.wang@corigine.com>
Signed-off-by: Peng Zhang <peng.zhang@corigine.com>
---
 drivers/net/nfp/nfp_ethdev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/nfp/nfp_ethdev.c b/drivers/net/nfp/nfp_ethdev.c
index 5729b8a2fd..e1da0bdebe 100644
--- a/drivers/net/nfp/nfp_ethdev.c
+++ b/drivers/net/nfp/nfp_ethdev.c
@@ -810,6 +810,7 @@ static int nfp_pf_init(struct rte_pci_device *pci_dev)
 	int total_ports;
 	int ret = -ENODEV;
 	int err;
+	uint32_t i;
 
 	if (!pci_dev)
 		return ret;
@@ -846,6 +847,10 @@ static int nfp_pf_init(struct rte_pci_device *pci_dev)
 		goto hwinfo_cleanup;
 	}
 
+	/* Force the physical port down to clear the possible DMA error */
+	for (i = 0; i < nfp_eth_table->count; i++)
+		nfp_eth_set_configured(cpp, nfp_eth_table->ports[i].index, 0);
+
 	if (nfp_fw_setup(pci_dev, cpp, nfp_eth_table, hwinfo)) {
 		PMD_INIT_LOG(ERR, "Error when uploading firmware");
 		ret = -EIO;
-- 
2.39.1