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Fix bogus MSI IRQ setup warning on RISC-V.

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Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'irq-urgent-2024-12-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq fix from Ingo Molnar:
 "Fix bogus MSI IRQ setup warning on RISC-V"

* tag 'irq-urgent-2024-12-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  PCI/MSI: Handle lack of irqdomain gracefully
This commit is contained in:
Linus Torvalds 2024-12-29 10:03:01 -08:00
commit feffd35a03
2 changed files with 9 additions and 2 deletions
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7
drivers/pci/msi/irqdomain.c
View File

@ -350,8 +350,11 @@ bool pci_msi_domain_supports(struct pci_dev *pdev, unsigned int feature_mask,
domain = dev_get_msi_domain(&pdev->dev);
if (!domain || !irq_domain_is_hierarchy(domain))
return mode == ALLOW_LEGACY;
if (!domain || !irq_domain_is_hierarchy(domain)) {
if (IS_ENABLED(CONFIG_PCI_MSI_ARCH_FALLBACKS))
return mode == ALLOW_LEGACY;
return false;
}
if (!irq_domain_is_msi_parent(domain)) {
/*

4
drivers/pci/msi/msi.c
View File

@ -433,6 +433,10 @@ int __pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec,
if (WARN_ON_ONCE(dev->msi_enabled))
return -EINVAL;
/* Test for the availability of MSI support */
if (!pci_msi_domain_supports(dev, 0, ALLOW_LEGACY))
return -ENOTSUPP;
nvec = pci_msi_vec_count(dev);
if (nvec < 0)
return nvec;