The DW PCIe MSI hardware does not support MSI-X irqs. Setting those up failed as a side effect of a bug which was fixed by 91f8ae823f2b (PCI: designware: Setup and clear exactly one MSI at a time). Now that this bug is fixed MSI-X irqs need to be rejected explicitly, otherwise devices trying to use them may end up with incorrectly working interrupts. Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> # 3.18 --- drivers/pci/host/pcie-designware.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pci/host/pcie-designware.c b/drivers/pci/host/pcie-designware.c index df781cdf13c1..17ca98657a28 100644 --- a/drivers/pci/host/pcie-designware.c +++ b/drivers/pci/host/pcie-designware.c @@ -283,6 +283,9 @@ static int dw_msi_setup_irq(struct msi_controller *chip, struct pci_dev *pdev, struct msi_msg msg; struct pcie_port *pp = sys_to_pcie(pdev->bus->sysdata); + if (desc->msi_attrib.is_msix) + return -EINVAL; + irq = assign_irq(1, desc, &pos); if (irq < 0) return irq; -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
