On 05/14/2013 01:23 AM, Yinghai Lu wrote:

> On Mon, May 13, 2013 at 9:08 AM, Jiang Liu <liuj97@gmail.com> wrote:
>> From: Gu Zheng <guz.fnst@cn.fujitsu.com>
>> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
>> index 4f0bc0a..bc075a3 100644
>> --- a/drivers/pci/probe.c
>> +++ b/drivers/pci/probe.c
>> @@ -1131,6 +1131,7 @@ static void pci_release_dev(struct device *dev)
>>         struct pci_dev *pci_dev;
>>
>>         pci_dev = to_pci_dev(dev);
>> +       pci_bus_put(pci_dev->bus);
>>         pci_release_capabilities(pci_dev);
>>         pci_release_of_node(pci_dev);
>>         kfree(pci_dev);
>> @@ -1269,11 +1270,10 @@ static struct pci_dev *pci_scan_device(struct pci_bus *bus, int devfn)
>>         if (!pci_bus_read_dev_vendor_id(bus, devfn, &l, 60*1000))
>>                 return NULL;
>>
>> -       dev = alloc_pci_dev();
>> +       dev = pci_alloc_dev(bus);
>>         if (!dev)
>>                 return NULL;
>>
>> -       dev->bus = bus;
>>         dev->devfn = devfn;
>>         dev->vendor = l & 0xffff;
>>         dev->device = (l >> 16) & 0xffff;
> 
> in pci_setup_device() fail path, it release the ref to that bus.

Yes, you're right, we need to release the bus' ref if pci_setup_device() failed.
Thanks for your correction.:)

Best regards,
Gu

> 
> Yinghai
>