From: ethan.zhao <ethan.zhao@oracle.com>
Date: Fri, 17 Jan 2014 03:41:05 +0000 (-0800)
Subject: ixgbe: set driver_max_VFs should be done before enabling SRIOV
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=31ac910e105db07e2f615d00cf20876b27538d52;p=linux-beck.git

ixgbe: set driver_max_VFs should be done before enabling SRIOV

commit 43dc4e01 Limit number of reported VFs to device
 specific value It doesn't work and always returns -EBUSY because VFs are
 already enabled.

ixgbe_enable_sriov()
        pci_enable_sriov()
                sriov_enable()
                {
                ... ..
                iov->ctrl |= PCI_SRIOV_CTRL_VFE | PCI_SRIOV_CTRL_MSE;
                pci_cfg_access_lock(dev);
                ... ...
                }

pci_sriov_set_totalvfs()
{
... ...
if (dev->sriov->ctrl & PCI_SRIOV_CTRL_VFE)
                return -EBUSY;
...
}

So should set driver_max_VFs with pci_sriov_set_totalvfs() before
enable VFs with ixgbe_enable_sriov().

V2: revised for net-next tree.

Signed-off-by: Ethan Zhao <ethan.kernel@gmail.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
index 3fd4d3f22478..61d985c9330b 100644
--- a/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
+++ b/drivers/net/ethernet/intel/ixgbe/ixgbe_main.c
@@ -8019,8 +8019,8 @@ static int ixgbe_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	/* Mailbox */
 	ixgbe_init_mbx_params_pf(hw);
 	memcpy(&hw->mbx.ops, ii->mbx_ops, sizeof(hw->mbx.ops));
-	ixgbe_enable_sriov(adapter);
 	pci_sriov_set_totalvfs(pdev, IXGBE_MAX_VFS_DRV_LIMIT);
+	ixgbe_enable_sriov(adapter);
 skip_sriov:
 
 #endif