diff options
| author | Hou Zhiqiang <Zhiqiang.Hou@nxp.com> | 2017-11-16 06:07:21 (GMT) |
|---|---|---|
| committer | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-12-12 07:32:39 (GMT) |
| commit | 5d8e97f7edab13e38fd94f2260a39a12285cb220 (patch) | |
| tree | 55f873bd3195754dab6d4c046142ba69fe4927ba | |
| parent | 5c471403646d11174073c77f7f9c049ec40149c2 (diff) | |
| download | linux-5d8e97f7edab13e38fd94f2260a39a12285cb220.tar.xz | |
PCI: Disable MSI for Freescale Layerscape PCIe RC mode
[context adjustment]
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>
Integrated-by: Zhao Qiang <qiang.zhao@nxp.com>
| -rw-r--r-- | drivers/pci/quirks.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 5d8151b..8eef457 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4634,3 +4634,11 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2030, quirk_no_aersid); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2031, quirk_no_aersid); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2032, quirk_no_aersid); DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x2033, quirk_no_aersid); + +/* 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); |