Similar to PCI multi-MSI reject MSI-X enablement when a irq domain is attached to the device which does not support MSI-X. Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> --- drivers/pci/msi/msi.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/pci/msi/msi.c +++ b/drivers/pci/msi/msi.c @@ -760,6 +760,10 @@ int __pci_enable_msix_range(struct pci_d if (WARN_ON_ONCE(dev->msix_enabled)) return -EINVAL; + /* Check MSI-X early on irq domain enabled architectures */ + if (!pci_msi_domain_supports(dev, MSI_FLAG_PCI_MSIX, ALLOW_LEGACY)) + return -ENOTSUPP; + if (!pci_msi_supported(dev, nvec) || dev->current_state != PCI_D0) return -EINVAL;
