[PATCH] iov: initialize NumVFs register to 0 at the end of sriov_init()

[Ethan Zhao]

After commit 4449f079722c ("PCI: Calculate maximum number of buses
required for VFs"),the initial value of NumVFs register was set to
non-zero after sriov_init() and no VFs was enabled in device driver.
this changed the behaviour of kernel exported by lspci and sysfs etc.
so this patch initialize the NumVFs register to zero after the
calculation of max_VF_buses was done.

Tested on stable 4.1 and passed building on stable 4.2-rc7

Signed-off-by: Ethan Zhao <ethan.zhao@xxxxxxxxxx>
Tested-by: Sriharsha Yadagudde <sriharsha.devdas@xxxxxxxxxx>
---
 drivers/pci/iov.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/pci/iov.c b/drivers/pci/iov.c
index ee0ebff..6969084 100644
--- a/drivers/pci/iov.c
+++ b/drivers/pci/iov.c
@@ -476,6 +476,7 @@ found:
 	dev->is_physfn = 1;
 	iov->max_VF_buses = virtfn_max_buses(dev);
 
+	pci_iov_set_numvfs(dev, 0);
 	return 0;
 
 failed:
-- 
1.8.3.1

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