netdev - [patch net-next RFC 4/7] nfp: Reorder devl_port_register/unregister() calls to be done when devlink is registered

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Message-Id: <20221201164608.209537-5-jiri@resnulli.us>
Date:   Thu,  1 Dec 2022 17:46:05 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, pabeni@...hat.com,
        edumazet@...gle.com, yangyingliang@...wei.com, leon@...nel.org
Subject: [patch net-next RFC 4/7] nfp: Reorder devl_port_register/unregister() calls to be done when devlink is registered

From: Jiri Pirko <jiri@...dia.com>

Move the code so devl_port_register/unregister() are called only
then devlink is registered.

Signed-off-by: Jiri Pirko <jiri@...dia.com>
---
 .../net/ethernet/netronome/nfp/nfp_net_main.c | 22 ++++++++++++++-----
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_net_main.c b/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
index abfe788d558f..9b4c48defd5c 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_main.c
@@ -752,7 +752,7 @@ int nfp_net_pci_probe(struct nfp_pf *pf)
 
 	err = nfp_shared_buf_register(pf);
 	if (err)
-		goto err_devlink_unreg;
+		goto err_clean_app;
 
 	err = nfp_devlink_params_register(pf);
 	if (err)
@@ -769,23 +769,29 @@ int nfp_net_pci_probe(struct nfp_pf *pf)
 	err = nfp_net_pf_alloc_irqs(pf);
 	if (err)
 		goto err_free_vnics;
+	devl_unlock(devlink);
 
+	devlink_register(devlink);
+
+	devl_lock(devlink);
 	err = nfp_net_pf_app_start(pf);
 	if (err)
-		goto err_free_irqs;
+		goto err_devlink_unreg;
 
 	err = nfp_net_pf_init_vnics(pf);
 	if (err)
 		goto err_stop_app;
 
 	devl_unlock(devlink);
-	devlink_register(devlink);
 
 	return 0;
 
 err_stop_app:
 	nfp_net_pf_app_stop(pf);
-err_free_irqs:
+	devl_unlock(devlink);
+err_devlink_unreg:
+	devlink_unregister(devlink);
+	devl_lock(devlink);
 	nfp_net_pf_free_irqs(pf);
 err_free_vnics:
 	nfp_net_pf_free_vnics(pf);
@@ -795,7 +801,7 @@ int nfp_net_pci_probe(struct nfp_pf *pf)
 	nfp_devlink_params_unregister(pf);
 err_shared_buf_unreg:
 	nfp_shared_buf_unregister(pf);
-err_devlink_unreg:
+err_clean_app:
 	cancel_work_sync(&pf->port_refresh_work);
 	nfp_net_pf_app_clean(pf);
 err_unmap:
@@ -808,7 +814,6 @@ void nfp_net_pci_remove(struct nfp_pf *pf)
 	struct devlink *devlink = priv_to_devlink(pf);
 	struct nfp_net *nn, *next;
 
-	devlink_unregister(priv_to_devlink(pf));
 	devl_lock(devlink);
 	list_for_each_entry_safe(nn, next, &pf->vnics, vnic_list) {
 		if (!nfp_net_is_data_vnic(nn))
@@ -818,6 +823,11 @@ void nfp_net_pci_remove(struct nfp_pf *pf)
 	}
 
 	nfp_net_pf_app_stop(pf);
+	devl_unlock(devlink);
+
+	devlink_unregister(priv_to_devlink(pf));
+
+	devl_lock(devlink);
 	/* stop app first, to avoid double free of ctrl vNIC's ddir */
 	nfp_net_debugfs_dir_clean(&pf->ddir);
 
-- 
2.37.3