From: Hou Zhiqiang Zhiqiang.Hou@nxp.com
[ Upstream commit 06dc4ee54e306eff61cbdac3593b42b09f618103 ]
The Freescale PCIe controller advertises the MSI/MSI-X capability in both RC and Endpoint mode, but in RC mode it doesn't support MSI/MSI-X by itself; it can only transfer MSI/MSI-X from downstream devices.
Add a quirk to prevent use of MSI/MSI-X in RC mode.
Signed-off-by: Hou Zhiqiang Zhiqiang.Hou@nxp.com Signed-off-by: Bjorn Helgaas bhelgaas@google.com Acked-by: Minghuan Lian minghuan.Lian@nxp.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pci/quirks.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index e7ed051ec125..c751f2f81142 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4912,3 +4912,11 @@ static void quirk_no_ats(struct pci_dev *pdev) DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x98e4, quirk_no_ats); DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6900, quirk_no_ats); #endif /* CONFIG_PCI_ATS */ + +/* Freescale PCIe doesn't support MSI in RC mode */ +static void quirk_fsl_no_msi(struct pci_dev *pdev) +{ + if (pci_pcie_type(pdev) == PCI_EXP_TYPE_ROOT_PORT) + pdev->no_msi = 1; +} +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, quirk_fsl_no_msi);