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@@ -549,7 +549,7 @@ get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
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* slot. */
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bus->number = tbus;
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pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0),
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- PCI_REVISION_ID, &work);
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+ PCI_CLASS_REVISION, &work);
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if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
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pci_bus_read_config_dword(bus,
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