linux-kernel - Re: [PATCH -v2 1/3] PCI: introduce PCIe Device Serial Number Capability support

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Message-ID: <1373552533.1349.4.camel@x61.thuisdomein>
Date:	Thu, 11 Jul 2013 16:22:13 +0200
From:	Paul Bolle <pebolle@...cali.nl>
To:	Yijing Wang <wangyijing@...wei.com>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org, Rafael <rjw@...k.pl>,
	Hanjun Guo <guohanjun@...wei.com>, jiang.liu@...wei.com
Subject: Re: [PATCH -v2 1/3] PCI: introduce PCIe Device Serial Number
 Capability support

On Thu, 2013-07-11 at 17:43 +0800, Yijing Wang wrote:
> Introduce PCIe Ext Capability Device Serial Number support,
> so we can use the unique device serial number to identify
> the physical device. During system suspend, if the PCIe
> device was removed and inserted a new same device, after
> system resume there is no good way to identify it, maybe
> Device Serial Number is a good choice if device support.
> 
> Signed-off-by: Yijing Wang <wangyijing@...wei.com>
> ---
>  drivers/pci/pci.c   |   27 +++++++++++++++++++++++++++
>  drivers/pci/probe.c |    2 ++
>  include/linux/pci.h |    3 +++
>  3 files changed, 32 insertions(+), 0 deletions(-)
>
[...] 
> diff --git a/include/linux/pci.h b/include/linux/pci.h
> index 0fd1f15..10d190b 100644
> --- a/include/linux/pci.h
> +++ b/include/linux/pci.h
> @@ -342,6 +342,7 @@ struct pci_dev {
>  	struct list_head msi_list;
>  	struct kset *msi_kset;
>  #endif
> +	u64 sn;		/* device serieal number, 0 if not support */

Typo: serieal

>  	struct pci_vpd *vpd;
>  #ifdef CONFIG_PCI_ATS
>  	union {

[...]


Paul Bolle

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