[PATCH v4 27/28] net/cnxk: fix hotplug detach sequence for first device

[Nithin Dabilpuram <ndabilpuram@marvell.com>]

Fix hotplug detach sequence to handle case where first PCI
device that is hosting NPA LF is being destroyed while in use.

Fixes: 5a4341c84979 ("net/cnxk: add platform specific probe and remove")
Cc: stable@dpdk.org

Signed-off-by: Nithin Dabilpuram <ndabilpuram@marvell.com>
---
 drivers/net/cnxk/cn10k_ethdev.c | 6 +++++-
 drivers/net/cnxk/cn9k_ethdev.c  | 6 +++++-
 drivers/net/cnxk/cnxk_ethdev.c  | 8 ++++----
 3 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/drivers/net/cnxk/cn10k_ethdev.c b/drivers/net/cnxk/cn10k_ethdev.c
index bc9e10f..96eeae4 100644
--- a/drivers/net/cnxk/cn10k_ethdev.c
+++ b/drivers/net/cnxk/cn10k_ethdev.c
@@ -778,8 +778,12 @@ cn10k_nix_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
 
 	/* Find eth dev allocated */
 	eth_dev = rte_eth_dev_allocated(pci_dev->device.name);
-	if (!eth_dev)
+	if (!eth_dev) {
+		/* Ignore if ethdev is in mid of detach state in secondary */
+		if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+			return 0;
 		return -ENOENT;
+	}
 
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
 		/* Setup callbacks for secondary process */
diff --git a/drivers/net/cnxk/cn9k_ethdev.c b/drivers/net/cnxk/cn9k_ethdev.c
index de33fa7..b46f5da 100644
--- a/drivers/net/cnxk/cn9k_ethdev.c
+++ b/drivers/net/cnxk/cn9k_ethdev.c
@@ -708,8 +708,12 @@ cn9k_nix_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
 
 	/* Find eth dev allocated */
 	eth_dev = rte_eth_dev_allocated(pci_dev->device.name);
-	if (!eth_dev)
+	if (!eth_dev) {
+		/* Ignore if ethdev is in mid of detach state in secondary */
+		if (rte_eal_process_type() != RTE_PROC_PRIMARY)
+			return 0;
 		return -ENOENT;
+	}
 
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY) {
 		/* Setup callbacks for secondary process */
diff --git a/drivers/net/cnxk/cnxk_ethdev.c b/drivers/net/cnxk/cnxk_ethdev.c
index 12ff30f..3912c24 100644
--- a/drivers/net/cnxk/cnxk_ethdev.c
+++ b/drivers/net/cnxk/cnxk_ethdev.c
@@ -1781,9 +1781,6 @@ cnxk_eth_dev_uninit(struct rte_eth_dev *eth_dev, bool reset)
 	struct rte_eth_fc_conf fc_conf;
 	int rc, i;
 
-	/* Disable switch hdr pkind */
-	roc_nix_switch_hdr_set(&dev->nix, 0, 0, 0, 0);
-
 	plt_free(eth_dev->security_ctx);
 	eth_dev->security_ctx = NULL;
 
@@ -1791,6 +1788,9 @@ cnxk_eth_dev_uninit(struct rte_eth_dev *eth_dev, bool reset)
 	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
 		return 0;
 
+	/* Disable switch hdr pkind */
+	roc_nix_switch_hdr_set(&dev->nix, 0, 0, 0, 0);
+
 	/* Clear the flag since we are closing down */
 	dev->configured = 0;
 
@@ -1927,7 +1927,7 @@ cnxk_nix_remove(struct rte_pci_device *pci_dev)
 
 	/* Check if this device is hosting common resource */
 	nix = roc_idev_npa_nix_get();
-	if (nix->pci_dev != pci_dev)
+	if (!nix || nix->pci_dev != pci_dev)
 		return 0;
 
 	/* Try nix fini now */
-- 
2.8.4