linux-kernel - [RFC PATCH 0/4] Allow Link state changes for Hot-Plug

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Date:	Tue, 19 Nov 2013 14:39:50 -0800
From:	Rajat Jain <rajatjain.linux@...il.com>
To:	Linux-PCI <linux-pci@...r.kernel.org>,
	Linux-hotplug <linux-hotplug@...r.kernel.org>,
	linux-kernel@...r.kernel.org
CC:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
	Alex Williamson <alex.williamson@...hat.com>,
	Yijing Wang <wangyijing@...wei.com>,
	Paul Bolle <pebolle@...cali.nl>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Rajat Jain <rajatjain.linux@...il.com>,
	Rajat Jain <rajatjain@...iper.net>,
	Guenter Roeck <groeck@...iper.net>
Subject: [RFC PATCH 0/4] Allow Link state changes for Hot-Plug


Hello,

This patch set enables the use of PCI Express link up and link down events
for Hotplug or Unplug. The requirement of such a feature was originally
discussed here:

http://www.spinics.net/lists/linux-pci/msg05783.html
http://www.spinics.net/lists/hotplug/msg05801.html

Patch [1/4]: makes a function non-static for use by patch 2.
Patch [2/4]: Contains the bulk logic to allow link events to be used
             for hotplug and removal.
Patch [3/4]: Makes the pciehp_power_thread() lock free by making it
             look at a work info->req instead of slot->state.
Patch [4/4]: Introduce slot->hotplug_lock to serialize the hotplug
             operations.

I'd appreciate if you could please review and provide me with any comments.

Thanks,

Rajat

Rajat Jain (4):
  pciehp: Make check_link_active() non-static
  pciehp: Use link state change notifications for hot-plug and removal
  pciehp: Ensure all hotplug events are processed, even very fast ones.
  pciehp: Introduce hotplug_lock to serialize HP events on each slot

 drivers/pci/hotplug/pciehp.h      |    6 ++
 drivers/pci/hotplug/pciehp_core.c |   10 +-
 drivers/pci/hotplug/pciehp_ctrl.c |  181 ++++++++++++++++++++++++++++++++++---
 drivers/pci/hotplug/pciehp_hpc.c  |   63 +++++++++----
 4 files changed, 229 insertions(+), 31 deletions(-)

-- 
1.7.9.5

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