linux-kernel - [PATCH 4.10 099/110] PCI: Disable MSI for HiSilicon Hip06/Hip07 Root Ports

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Message-Id: <20170410164206.717994106@linuxfoundation.org>
Date:   Mon, 10 Apr 2017 18:43:30 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dongdong Liu <liudongdong3@...wei.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Gabriele Paoloni <gabriele.paoloni@...wei.com>,
        Zhou Wang <wangzhou1@...ilicon.com>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.10 099/110] PCI: Disable MSI for HiSilicon Hip06/Hip07 Root Ports

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

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

From: Dongdong Liu <liudongdong3@...wei.com>

[ Upstream commit 72f2ff0deb870145a5a2d24cd75b4f9936159a62 ]

The PCIe Root Port in Hip06/Hip07 SoCs advertises an MSI capability, but it
cannot generate MSIs.  It can transfer MSI/MSI-X from downstream devices,
but does not support MSI/MSI-X itself.

Add a quirk to prevent use of MSI/MSI-X by the Root Port.

[bhelgaas: changelog, sort vendor ID #define, drop device ID #define]
Signed-off-by: Dongdong Liu <liudongdong3@...wei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@...gle.com>
Reviewed-by: Gabriele Paoloni <gabriele.paoloni@...wei.com>
Reviewed-by: Zhou Wang <wangzhou1@...ilicon.com>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/pci/quirks.c    |    1 +
 include/linux/pci_ids.h |    2 ++
 2 files changed, 3 insertions(+)

--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -1634,6 +1634,7 @@ static void quirk_pcie_mch(struct pci_de
 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);
 
 
 /*
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -2516,6 +2516,8 @@
 #define PCI_DEVICE_ID_KORENIX_JETCARDF2	0x1700
 #define PCI_DEVICE_ID_KORENIX_JETCARDF3	0x17ff
 
+#define PCI_VENDOR_ID_HUAWEI         	0x19e5
+
 #define PCI_VENDOR_ID_NETRONOME		0x19ee
 #define PCI_DEVICE_ID_NETRONOME_NFP3200	0x3200
 #define PCI_DEVICE_ID_NETRONOME_NFP3240	0x3240