linux-kernel - Re: [BUGFIX 0/9] Fix bug 59501 and code improvement for dock driver

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Date:	Thu, 13 Jun 2013 20:43:50 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Jiang Liu (Gerry)" <jiang.liu@...wei.com>
Cc:	"Rafael J . Wysocki" <rjw@...k.pl>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	"Alexander E . Patrakov" <patrakov@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Yijing Wang <wangyijing@...wei.com>,
	Jiang Liu <liuj97@...il.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [BUGFIX 0/9] Fix bug 59501 and code improvement for dock driver

On Thu, Jun 13, 2013 at 8:30 PM, Yinghai Lu <yinghai@...nel.org> wrote:
> On Thu, Jun 13, 2013 at 7:51 PM, Jiang Liu (Gerry) <jiang.liu@...wei.com> wrote:

>> For the first step, I'm trying to make hotplug case work in the same way as
>> boot time. Do you think this patch help?
>>
>> diff --git a/drivers/pci/hotplug/acpiphp_glue.c
>> b/drivers/pci/hotplug/acpiphp_gl
>> index 270fdba..12e3f6e 100644
>> --- a/drivers/pci/hotplug/acpiphp_glue.c
>> +++ b/drivers/pci/hotplug/acpiphp_glue.c
>> @@ -837,13 +837,13 @@ static int __ref enable_device(struct acpiphp_slot
>> *slot)
>>                                 max = pci_scan_bridge(bus, dev, max, pass);
>>                                 if (pass && dev->subordinate) {
>>                                         check_hotplug_bridge(slot, dev);
>> - pci_bus_size_bridges(dev->subordinate);
>> + pcibios_resource_survey_bus(dev->subordi
>>                                 }
>>                         }
>>                 }
>>         }
>>
>> -       pci_bus_assign_resources(bus);
>> +       pci_assign_unassigned_bus_resources(bus);

can not use use pci_assign_unassigned_bus_resources directly. as bus
could have devices that is there already
before this enable_device and could have driver loaded before.

that is why we have checking
    if (PCI_SLOT(dev->devfn) != slot->device)
--
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