[PATCH 2/4] pci init: fail qemu if devfn exceeding the max function number supported on bus

[Ken CC <ken.ccao@xxxxxxxxx>]

Check if devfn < PCIBUS_MAX_DEVICES * PCI_FUNCTIONS_PER_DEVICE

Signed-off-by: Ken CC <ken.ccao@xxxxxxxxx>
---
 hw/pci.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/hw/pci.c b/hw/pci.c
index 9234fe3..fc4becd 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -747,6 +747,7 @@ static PCIDevice *do_pci_register_device(PCIDevice *pci_dev, PCIBus *bus,
                                          PCIConfigWriteFunc *config_write,
                                          bool is_bridge)
 {
+    assert(devfn / PCI_FUNCTIONS_PER_DEVICE < PCIBUS_MAX_DEVICES);
     if (devfn < 0) {
         for(devfn = bus->devfn_min ; devfn < ARRAY_SIZE(bus->devices);
             devfn += PCI_FUNC_MAX) {

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