linux-kernel - Re: [PATCH part1 v6 0/7] Introduce PCIe Device Serial Number capability support

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Message-ID: <5301CDD8.5020808@huawei.com>
Date:	Mon, 17 Feb 2014 16:52:40 +0800
From:	Yijing Wang <wangyijing@...wei.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
CC:	Yijing Wang <wangyijing@...wei.com>,
	<linux-kernel@...r.kernel.org>, <linux-pci@...r.kernel.org>,
	Hanjun Guo <guohanjun@...wei.com>
Subject: Re: [PATCH part1 v6 0/7] Introduce PCIe Device Serial Number capability
 support

Hi Bjorn,
   Sorry to bother you, any comment about this series?

Thanks!
Yijing.

On 2014/2/12 10:52, Yijing Wang wrote:
> v5->v6: Add is_frozen flag to protect pci bus from double frozen.
> 
> This series is based on Bjorn's pci-next branch.
> Currently, more and more PCIe devices support PCIe DSN(Device Serial Number)
> capability, we can use this cap to identify device. In some platform,
> when we hotplug PCIe device, no interrupts will be received in system.
> So we can not identify the device whether is changed during suspend.
> PCIe DSN can help to identify this. 
> 
> Legacy PCI device can achieve it by PCI Vital Product Data capability.
> We can use its SN keyword to report the unique number.
> But in my platform, PCI devices which support VPD SN cap report the
> meaningless same string "0123456789". 
> Rework PCI VPD code to support device identification is not an easy work.
> Plan to do it in part2.
> 
> Yijing Wang (7):
>   PCI: rework pci_find_next_ext_capability()
>   PCI: introduce pci_bus_find_ext_capability()
>   PCI: Add support for Device Serial Number capability
>   PCI: Introduce pci_serial_number_changed()
>   PCI: Add pci_dummy_ops to isolate pci device temporarily
>   PCI: Check pci device serial number when scan device
>   PCI: pciehp: Don't enable/disable slot on resume unless status
>     changed
> 
>  drivers/pci/hotplug/pciehp_core.c |   10 ++-
>  drivers/pci/pci.c                 |  169 +++++++++++++++++++++++++++++++++++--
>  drivers/pci/pci.h                 |    2 +-
>  drivers/pci/probe.c               |   15 +++-
>  include/linux/pci.h               |   10 ++-
>  5 files changed, 192 insertions(+), 14 deletions(-)
> 
> 
> 
> .
> 


-- 
Thanks!
Yijing

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