Commit deb86999 authored Dec 28, 2017 by Dongdong Liu Committed by Bjorn Helgaas Jan 12, 2018

PCI: Disable MSI for HiSilicon Hip06/Hip07 only in Root Port mode



HiSilicon Hip06/Hip07 can operate as either a Root Port or an Endpoint.  It
always advertises an MSI capability, but it can only generate MSIs when in
Endpoint mode.

The device has the same Vendor and Device IDs in both modes, so check the
Class Code and disable MSI only when operating as a Root Port.

[bhelgaas: changelog]
Fixes: 72f2ff0d ("PCI: Disable MSI for HiSilicon Hip06/Hip07 Root Ports")
Signed-off-by: Dongdong Liu <liudongdong3@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Zhou Wang <wangzhou1@hisilicon.com>
Cc: stable@vger.kernel.org	# v4.11+

parent 1291a0d5

drivers/pci/quirks.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1636,8 +1636,8 @@ static void quirk_pcie_mch(struct pci_dev *pdev)
		DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7520_MCH, quirk_pcie_mch);
		DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7320_MCH, quirk_pcie_mch);
		DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_E7525_MCH, quirk_pcie_mch);
		DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_HUAWEI, 0x1610, quirk_pcie_mch);

		DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_HUAWEI, 0x1610, PCI_CLASS_BRIDGE_PCI, 8, quirk_pcie_mch);

		/*
		* It's possible for the MSI to get corrupted if shpc and acpi

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