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    Subject[patch 01/39] PCI/MSI: Check for MSI enabled in __pci_msix_enable()
    Date
    PCI/MSI and PCI/MSI-X are mutually exclusive, but the MSI-X enable code
    lacks a check for already enabled MSI.

    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    ---
    drivers/pci/msi/msi.c | 5 +++++
    1 file changed, 5 insertions(+)

    --- a/drivers/pci/msi/msi.c
    +++ b/drivers/pci/msi/msi.c
    @@ -935,6 +935,11 @@ static int __pci_enable_msix_range(struc
    if (maxvec < minvec)
    return -ERANGE;

    + if (dev->msi_enabled) {
    + pci_info(dev, "can't enable MSI-X (MSI already enabled)\n");
    + return -EINVAL;
    + }
    +
    if (WARN_ON_ONCE(dev->msix_enabled))
    return -EINVAL;

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