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s390/PCI: Fix single MSI only check
Multiple MSIs have never been supported on s390 architecture, but the platform code fails to report single MSI only. Signed-off-by: Alexander Gordeev <agordeev@redhat.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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@ -409,6 +409,8 @@ int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
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if (type != PCI_CAP_ID_MSIX && type != PCI_CAP_ID_MSI)
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return -EINVAL;
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if (type == PCI_CAP_ID_MSI && nvec > 1)
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return 1;
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msi_vecs = min(nvec, ZPCI_MSI_VEC_MAX);
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msi_vecs = min_t(unsigned int, msi_vecs, CONFIG_PCI_NR_MSI);
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