diff options
| author | Hou Zhiqiang <Zhiqiang.Hou@nxp.com> | 2017-10-12 12:44:47 +0300 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2017-10-20 21:25:03 +0300 |
| commit | 06dc4ee54e306eff61cbdac3593b42b09f618103 (patch) | |
| tree | 9459bff1da8b281624ec0f269bd4c12174c435ec /drivers/pci/quirks.c | |
| parent | 0c6b93d2b3cf6eb46c3c916a44caef112db36628 (diff) | |
| download | linux-06dc4ee54e306eff61cbdac3593b42b09f618103.tar.xz | |
PCI: Disable MSI for Freescale Layerscape PCIe RC mode
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>
Diffstat (limited to 'drivers/pci/quirks.c')
| -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 a4d33619a7bb..c1063a420f0c 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4799,3 +4799,11 @@ static void quirk_no_ats(struct pci_dev *pdev) /* AMD Stoney platform GPU */ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x98e4, 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); |