forked from Minki/linux
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: Aleksandr Bezzubikov <zuban32s@gmail.com> [bhelgaas: changelog] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Cc: stable@vger.kernel.org
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@ -1062,6 +1062,8 @@ int shpc_init(struct controller *ctrl, struct pci_dev *pdev)
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if (rc) {
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ctrl_info(ctrl, "Can't get msi for the hotplug controller\n");
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ctrl_info(ctrl, "Use INTx for the hotplug controller\n");
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} else {
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pci_set_master(pdev);
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}
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rc = request_irq(ctrl->pci_dev->irq, shpc_isr, IRQF_SHARED,
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