eth: nfp: replace driver's "pf" lock with devlink instance lock

The whole reason for existence of the pf mutex is that we could
not lock the devlink instance around port splitting. There are
more types of reconfig which can make ports appear or disappear.
Now that the devlink instance lock is exposed to drivers and
"locked" helpers exist we can switch to using the devlink lock
directly.

Next patches will move the locking inside .port_(un)split to
the core.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 10 insertions, 9 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/nfp_main.c b/drivers/net/ethernet/netronome/nfp/nfp_main.c
index 8693f9905fbe..eeda39e34f84 100644
--- a/drivers/net/ethernet/netronome/nfp/nfp_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_main.c
@@ -227,6 +227,7 @@ static int nfp_pcie_sriov_enable(struct pci_dev *pdev, int num_vfs)
 {
 #ifdef CONFIG_PCI_IOV
 	struct nfp_pf *pf = pci_get_drvdata(pdev);
+	struct devlink *devlink;
 	int err;
 
 	if (num_vfs > pf->limit_vfs) {
@@ -241,7 +242,8 @@ static int nfp_pcie_sriov_enable(struct pci_dev *pdev, int num_vfs)
 		return err;
 	}
 
-	mutex_lock(&pf->lock);
+	devlink = priv_to_devlink(pf);
+	devl_lock(devlink);
 
 	err = nfp_app_sriov_enable(pf->app, num_vfs);
 	if (err) {
@@ -255,11 +257,11 @@ static int nfp_pcie_sriov_enable(struct pci_dev *pdev, int num_vfs)
 
 	dev_dbg(&pdev->dev, "Created %d VFs.\n", pf->num_vfs);
 
-	mutex_unlock(&pf->lock);
+	devl_unlock(devlink);
 	return num_vfs;
 
 err_sriov_disable:
-	mutex_unlock(&pf->lock);
+	devl_unlock(devlink);
 	pci_disable_sriov(pdev);
 	return err;
 #endif
@@ -270,8 +272,10 @@ static int nfp_pcie_sriov_disable(struct pci_dev *pdev)
 {
 #ifdef CONFIG_PCI_IOV
 	struct nfp_pf *pf = pci_get_drvdata(pdev);
+	struct devlink *devlink;
 
-	mutex_lock(&pf->lock);
+	devlink = priv_to_devlink(pf);
+	devl_lock(devlink);
 
 	/* If the VFs are assigned we cannot shut down SR-IOV without
 	 * causing issues, so just leave the hardware available but
@@ -279,7 +283,7 @@ static int nfp_pcie_sriov_disable(struct pci_dev *pdev)
 	 */
 	if (pci_vfs_assigned(pdev)) {
 		dev_warn(&pdev->dev, "Disabling while VFs assigned - VFs will not be deallocated\n");
-		mutex_unlock(&pf->lock);
+		devl_unlock(devlink);
 		return -EPERM;
 	}
 
@@ -287,7 +291,7 @@ static int nfp_pcie_sriov_disable(struct pci_dev *pdev)
 
 	pf->num_vfs = 0;
 
-	mutex_unlock(&pf->lock);
+	devl_unlock(devlink);
 
 	pci_disable_sriov(pdev);
 	dev_dbg(&pdev->dev, "Removed VFs.\n");
@@ -707,7 +711,6 @@ static int nfp_pci_probe(struct pci_dev *pdev,
 	pf = devlink_priv(devlink);
 	INIT_LIST_HEAD(&pf->vnics);
 	INIT_LIST_HEAD(&pf->ports);
-	mutex_init(&pf->lock);
 	pci_set_drvdata(pdev, pf);
 	pf->pdev = pdev;
 	pf->dev_info = dev_info;
@@ -798,7 +801,6 @@ err_disable_msix:
 	destroy_workqueue(pf->wq);
 err_pci_priv_unset:
 	pci_set_drvdata(pdev, NULL);
-	mutex_destroy(&pf->lock);
 	devlink_free(devlink);
 err_rel_regions:
 	pci_release_regions(pdev);
@@ -835,7 +837,6 @@ static void __nfp_pci_shutdown(struct pci_dev *pdev, bool unload_fw)
 
 	kfree(pf->eth_tbl);
 	kfree(pf->nspi);
-	mutex_destroy(&pf->lock);
 	devlink_free(priv_to_devlink(pf));
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);