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s390/PCI: Fix single MSI only check

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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>
This commit is contained in:
Alexander Gordeev 2013-12-16 09:34:54 +01:00 committed by Bjorn Helgaas
parent 1c51b50c29
commit a384c8924a
1 changed files with 2 additions and 0 deletions
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arch/s390/pci/pci.c
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@ -409,6 +409,8 @@ int arch_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
if (type != PCI_CAP_ID_MSIX && type != PCI_CAP_ID_MSI)
return -EINVAL;
if (type == PCI_CAP_ID_MSI && nvec > 1)
return 1;
msi_vecs = min(nvec, ZPCI_MSI_VEC_MAX);
msi_vecs = min_t(unsigned int, msi_vecs, CONFIG_PCI_NR_MSI);