Re: [PATCH v7 08/10] PCI, x86: add MMCFG information on demand

[Jiang Liu <jiang.liu@huawei.com>]

On 2012-6-16 0:51, Yinghai Lu wrote:
> 
> still have some problem:
> pci_mmcfg_check_reserved==>is_mmconf_reserved
> 
> will update cfg->end_bus.
Hi Yinghai,
	How about following patch for this issue? I guess we need to
keep current behavior at boot time for backward compatibility, right?

---
@@ -472,6 +472,14 @@ static int __devinit is_mmconf_reserved(check_reserved_t is_reserved,
                        break;
        }

+       /*
+        * For backward compatibility, we will adjust the MMCONFIG region
+        * at boot time if it's only partially reserved by firmware.
+        * For PCI host bridge hotplug at runtime, just reject it.
+        */
+       if (pci_mmcfg_running_state && old_size != size)
+               return 0;
+
        if (size < (16UL<<20) && size != old_size)
                return 0;

---

> 
> Thanks
> 
> Yinghai
> 
> .
>