[PATCH 3.19.y-ckt 014/156] PCI: Add VPD function 0 quirk for Intel Ethernet devices

[Kamal Mostafa]

3.19.8-ckt8 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mark Rustad <mark.d.rustad at intel.com>

commit 7aa6ca4d39edf01f997b9e02cf6d2fdeb224f351 upstream.

Set the PCI_DEV_FLAGS_VPD_REF_F0 flag on all Intel Ethernet device
functions other than function 0, so that on multi-function devices, we will
always read VPD from function 0 instead of from the other functions.

[bhelgaas: changelog]
Signed-off-by: Mark Rustad <mark.d.rustad at intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas at google.com>
Acked-by: Alexander Duyck <alexander.h.duyck at redhat.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 drivers/pci/quirks.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 903d507..cfa0f20 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1903,6 +1903,15 @@ static void quirk_netmos(struct pci_dev *dev)
 DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_NETMOS, PCI_ANY_ID,
 			 PCI_CLASS_COMMUNICATION_SERIAL, 8, quirk_netmos);
 
+static void quirk_f0_vpd_link(struct pci_dev *dev)
+{
+	if (!dev->multifunction || !PCI_FUNC(dev->devfn))
+		return;
+	dev->dev_flags |= PCI_DEV_FLAGS_VPD_REF_F0;
+}
+DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID,
+			      PCI_CLASS_NETWORK_ETHERNET, 8, quirk_f0_vpd_link);
+
 static void quirk_e100_interrupt(struct pci_dev *dev)
 {
 	u16 command, pmcsr;
-- 
1.9.1