Commit 99f3d279 authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

PCI/MSI: Reject MSI-X early 



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: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Acked-by: default avatarBjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20221111122015.631728309@linutronix.de
parent d2a463b2

drivers/pci/msi/msi.c

+4 −0
Original line number Diff line number Diff line
@@ -762,6 +762,10 @@ int __pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries, int 
	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;