linux-kernel - Re: [PATCH v11 1/8] PCI: initialize and release SR-IOV capability

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Date:	Fri, 20 Mar 2009 11:28:15 +0800
From:	"Zhao, Yu" <yu.zhao@...el.com>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>
CC:	Matthew Wilcox <matthew@....cx>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v11 1/8] PCI: initialize and release SR-IOV capability

Jesse Barnes wrote:
> On Thu, 19 Mar 2009 13:53:12 -0600
> Matthew Wilcox <matthew@....cx> wrote:
> 
>> On Wed, Mar 11, 2009 at 03:25:42PM +0800, Yu Zhao wrote:
>>> +config PCI_IOV
>>> +	bool "PCI IOV support"
>>> +	depends on PCI
>>> +	help
>>> +	  PCI-SIG I/O Virtualization (IOV) Specifications support.
>>> +	  Single Root IOV: allows the creation of virtual PCI
>>> devices
>>> +	  that share the physical resources from a real device.
>>> +
>>> +	  When in doubt, say N.
>> It's certainly shorter than my text, which is nice.  But I think it
>> still has too much spec-ese and not enough explanation.  How about:
>>
>> 	help
>> 	  I/O Virtualization is a PCI feature supported by some
>> devices which allows them to create virtual devices which share their
>> 	  physical resources.
>>
>> 	  If unsure, say N.
>>
>>> +	list_for_each_entry(pdev, &dev->bus->devices, bus_list)
>>> +		if (pdev->is_physfn)
>>> +			break;
>>> +	if (list_empty(&dev->bus->devices) || !pdev->is_physfn)
>>> +		pdev = NULL;
>> This is still wrong.  If the 'break' condition is not hit, pdev is
>> pointing to garbage, not to the last pci_dev in the list.
>>
>>> @@ -270,6 +278,7 @@ struct pci_dev {
>>>  	struct list_head msi_list;
>>>  #endif
>>>  	struct pci_vpd *vpd;
>>> +	struct pci_sriov *sriov;	/* SR-IOV capability
>>> related */
>> Should be ifdeffed?
> 
> Ok Yu, I'm ready to apply this set, can you send an updated one with
> the fixes Matthew mentioned?

Thanks, Jesse. I updated this one according to Matthew's comments and 
respan others in patchset v12 so they can be cleanly applied.
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