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PCI/MSI: Reject MSI-X early

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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@linutronix.de>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Link: https://lore.kernel.org/r/20221111122015.631728309@linutronix.de
This commit is contained in:
Thomas Gleixner 2022-11-11 14:55:11 +01:00
parent d2a463b297
commit 99f3d27976
1 changed files with 4 additions and 0 deletions
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4
drivers/pci/msi/msi.c
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@ -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;