linux-kernel - [PATCH] igb: SR-IOV init reordering

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Date:	Tue, 12 Mar 2013 15:25:58 -0600
From:	Alex Williamson <alex.williamson@...hat.com>
To:	gregory.v.rose@...el.com, jeffrey.t.kirsher@...el.com
Cc:	netdev@...r.kernel.org, ddutile@...hat.com,
	linux-kernel@...r.kernel.org, sassmann@...hat.com
Subject: [PATCH] igb: SR-IOV init reordering

igb is ineffective at setting a lower total VFs because:

int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
{
        ...
        /* Shouldn't change if VFs already enabled */
        if (dev->sriov->ctrl & PCI_SRIOV_CTRL_VFE)
                return -EBUSY;

Swap init ordering.

Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
---
 drivers/net/ethernet/intel/igb/igb_main.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c
index d5b8289..ac65c39 100644
--- a/drivers/net/ethernet/intel/igb/igb_main.c
+++ b/drivers/net/ethernet/intel/igb/igb_main.c
@@ -2546,8 +2546,8 @@ static void igb_probe_vfs(struct igb_adapter *adapter)
 	if ((hw->mac.type == e1000_i210) || (hw->mac.type == e1000_i211))
 		return;
 
-	igb_enable_sriov(pdev, max_vfs);
 	pci_sriov_set_totalvfs(pdev, 7);
+	igb_enable_sriov(pdev, max_vfs);
 
 #endif /* CONFIG_PCI_IOV */
 }

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