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-rw-r--r--hw/pci/pci.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index bd8043c460..259483b1c0 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -869,8 +869,10 @@ static void do_pci_unregister_device(PCIDevice *pci_dev)
pci_dev->bus->devices[pci_dev->devfn] = NULL;
pci_config_free(pci_dev);
- memory_region_del_subregion(&pci_dev->bus_master_container_region,
- &pci_dev->bus_master_enable_region);
+ if (memory_region_is_mapped(&pci_dev->bus_master_enable_region)) {
+ memory_region_del_subregion(&pci_dev->bus_master_container_region,
+ &pci_dev->bus_master_enable_region);
+ }
address_space_destroy(&pci_dev->bus_master_as);
}