linux-kernel - [PATCH 3.4 05/92] PCI: Add VPD function 0 quirk for Intel Ethernet devices

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Message-Id: <1460976397-5688-5-git-send-email-lizf@kernel.org>
Date:	Mon, 18 Apr 2016 18:45:10 +0800
From:	lizf@...nel.org
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Mark Rustad <mark.d.rustad@...el.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Ben Hutchings <ben@...adent.org.uk>,
	Zefan Li <lizefan@...wei.com>
Subject: [PATCH 3.4 05/92] PCI: Add VPD function 0 quirk for Intel Ethernet devices

From: Mark Rustad <mark.d.rustad@...el.com>

3.4.112-rc1 review patch.  If anyone has any objections, please let me know.

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


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@...el.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Acked-by: Alexander Duyck <alexander.h.duyck@...hat.com>
[bwh: Backported to 3.2:
 - Put the class check in the new function as there is no
   DECLARE_PCI_FIXUP_CLASS_EARLY(
 - Adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
Signed-off-by: Zefan Li <lizefan@...wei.com>
---
 drivers/pci/quirks.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 887af797..3ce87c8 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1883,6 +1883,15 @@ static void __devinit 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->class >> 8) != PCI_CLASS_NETWORK_ETHERNET ||
+	    !dev->multifunction || !PCI_FUNC(dev->devfn))
+		return;
+	dev->dev_flags |= PCI_DEV_FLAGS_VPD_REF_F0;
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, quirk_f0_vpd_link);
+
 static void __devinit quirk_e100_interrupt(struct pci_dev *dev)
 {
 	u16 command, pmcsr;
-- 
1.9.1