From badc0e42604c4465facd81d2323e98b3b1eb9188 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Tue, 27 Oct 2015 13:37:40 -0300 Subject: Linux-libre 4.2.4-gnu --- drivers/pci/quirks.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-) (limited to 'drivers/pci/quirks.c') diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index dbd13854f..6b1c6a915 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -1906,11 +1906,27 @@ 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); +/* + * Quirk non-zero PCI functions to route VPD access through function 0 for + * devices that share VPD resources between functions. The functions are + * expected to be identical devices. + */ static void quirk_f0_vpd_link(struct pci_dev *dev) { - if (!dev->multifunction || !PCI_FUNC(dev->devfn)) + struct pci_dev *f0; + + if (!PCI_FUNC(dev->devfn)) return; - dev->dev_flags |= PCI_DEV_FLAGS_VPD_REF_F0; + + f0 = pci_get_slot(dev->bus, PCI_DEVFN(PCI_SLOT(dev->devfn), 0)); + if (!f0) + return; + + if (f0->vpd && dev->class == f0->class && + dev->vendor == f0->vendor && dev->device == f0->device) + dev->dev_flags |= PCI_DEV_FLAGS_VPD_REF_F0; + + pci_dev_put(f0); } DECLARE_PCI_FIXUP_CLASS_EARLY(PCI_VENDOR_ID_INTEL, PCI_ANY_ID, PCI_CLASS_NETWORK_ETHERNET, 8, quirk_f0_vpd_link); -- cgit v1.2.3-54-g00ecf