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-rw-r--r--drivers/pci/setup-bus.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 54404917be9..8f7bcf56f14 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -55,16 +55,16 @@ pbus_assign_resources_sorted(struct pci_bus *bus)
list_for_each_entry(dev, &bus->devices, bus_list) {
u16 class = dev->class >> 8;
- /* Don't touch classless devices or host bridges. */
+ /* Don't touch classless devices or host bridges or ioapics. */
if (class == PCI_CLASS_NOT_DEFINED ||
class == PCI_CLASS_BRIDGE_HOST)
continue;
- /* Don't touch ioapics if it has the assigned resources. */
+ /* Don't touch ioapic devices already enabled by firmware */
if (class == PCI_CLASS_SYSTEM_PIC) {
- res = &dev->resource[0];
- if (res[0].start || res[1].start || res[2].start ||
- res[3].start || res[4].start || res[5].start)
+ u16 command;
+ pci_read_config_word(dev, PCI_COMMAND, &command);
+ if (command & (PCI_COMMAND_IO | PCI_COMMAND_MEMORY))
continue;
}