PCI: shpchp: Enable bridge bus mastering if MSI is enabled
An SHPC may generate MSIs to notify software about slot or controller events (SHPC spec r1.0, sec 4.7). A PCI device can only generate an MSI if it has bus mastering enabled. Enable bus mastering if the bridge contains an SHPC that uses MSI for event notifications. Signed-off-by: NAleksandr Bezzubikov <zuban32s@gmail.com> [bhelgaas: changelog] Signed-off-by: NBjorn Helgaas <bhelgaas@google.com> Reviewed-by: NMarcel Apfelbaum <marcel@redhat.com> Acked-by: NMichael S. Tsirkin <mst@redhat.com> Cc: stable@vger.kernel.org
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