On 2017/1/3 14:39, Tomasz Nowicki wrote:
> On 22.12.2016 10:07, Zhou Wang wrote:
>> Multiple PCIe host bridges may exists in one PCIe segment. So bus range for each
>> host bridge should be in the coverage of bus range of related PCIe segment.
>>
>> This patch will support this kind of scenario:
>>
>> MCFG:
>> bus range: 0x00~0xff.
>> segment: 0.
>> DSDT:
>> host bridge 1:
>> bus range: 0x00~0x1f.
>> segment: 0.
>> host bridge 2:
>> bus range: 0x20~0x4f.
>> segment: 0.
>>
>> Signed-off-by: Zhou Wang <wangzhou1@xxxxxxxxxxxxx>
>> ---
>> drivers/acpi/pci_mcfg.c | 5 ++---
>> 1 file changed, 2 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/acpi/pci_mcfg.c b/drivers/acpi/pci_mcfg.c
>> index b5b376e..46a3e32 100644
>> --- a/drivers/acpi/pci_mcfg.c
>> +++ b/drivers/acpi/pci_mcfg.c
>> @@ -40,11 +40,10 @@ phys_addr_t pci_mcfg_lookup(u16 seg, struct resource *bus_res)
>> struct mcfg_entry *e;
>>
>> /*
>> - * We expect exact match, unless MCFG entry end bus covers more than
>> - * specified by caller.
>> + * We expect the range in bus_res in the coverage of MCFG bus range.
>> */
>> list_for_each_entry(e, &pci_mcfg_list, list) {
>> - if (e->segment == seg && e->bus_start == bus_res->start &&
>> + if (e->segment == seg && e->bus_start <= bus_res->start &&
>> e->bus_end >= bus_res->end)
>> return e->addr;
>> }
>>
>
> Looks good to me.
>
> Reviewed-by: Tomasz Nowicki <tn@xxxxxxxxxxxx>
Hi Tomasz,
Thanks for your review.
Regards,
Zhou
>
> Thanks,
> Tomasz
>
> .
>
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