[Qemu-devel] [PATCH 08/12] pci: allow 0 address for PCI IO regions

[Michael Roth <mdroth@linux.vnet.ibm.com>]

Some kernels program a 0 address for io regions. PCI 3.0 spec
section 6.2.5.1 doesn't seem to disallow this.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
---
 hw/pci/pci.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 351d320..9578749 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -1035,7 +1035,7 @@ static pcibus_t pci_bar_address(PCIDevice *d,
         /* Check if 32 bit BAR wraps around explicitly.
          * TODO: make priorities correct and remove this work around.
          */
-        if (last_addr <= new_addr || new_addr == 0 || last_addr >= UINT32_MAX) {
+        if (last_addr <= new_addr || last_addr >= UINT32_MAX) {
             return PCI_BAR_UNMAPPED;
         }
         return new_addr;
-- 
1.9.1