From: Alexander Duyck <alexander.h.duyck@intel.com>
Date: Tue, 24 Apr 2018 16:47:27 -0500
Subject: [PATCH] nvme-pci: Use pci_sriov_configure_simple() to enable VFs
Git-commit: 74d986abc20bc2f0190a4e2683b9ae4d2de4117b
Patch-mainline: v4.18-rc1
References: bsc#1104967,FATE#325924

Instead of implementing our own version of a SR-IOV configuration stub in
the nvme driver, use the existing pci_sriov_configure_simple() function.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Hannes Reinecke <hare@suse.com>
---
 drivers/nvme/host/pci.c | 20 +-------------------
 1 file changed, 1 insertion(+), 19 deletions(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index fbc71fac6f1e..284cdd336271 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -2598,24 +2598,6 @@ static void nvme_remove(struct pci_dev *pdev)
 	nvme_put_ctrl(&dev->ctrl);
 }
 
-static int nvme_pci_sriov_configure(struct pci_dev *pdev, int numvfs)
-{
-	int ret = 0;
-
-	if (numvfs == 0) {
-		if (pci_vfs_assigned(pdev)) {
-			dev_warn(&pdev->dev,
-				"Cannot disable SR-IOV VFs while assigned\n");
-			return -EPERM;
-		}
-		pci_disable_sriov(pdev);
-		return 0;
-	}
-
-	ret = pci_enable_sriov(pdev, numvfs);
-	return ret ? ret : numvfs;
-}
-
 #ifdef CONFIG_PM_SLEEP
 static int nvme_suspend(struct device *dev)
 {
@@ -2734,7 +2716,7 @@ static struct pci_driver nvme_driver = {
 	.driver		= {
 		.pm	= &nvme_dev_pm_ops,
 	},
-	.sriov_configure = nvme_pci_sriov_configure,
+	.sriov_configure = pci_sriov_configure_simple,
 	.err_handler	= &nvme_err_handler,
 };
 
-- 
2.12.3