From: Rajat Jain <rajatxjain@gmail.com>
Date: Wed, 5 Feb 2014 02:31:11 +0000 (-0800)
Subject: PCI: pciehp: Add hotplug_lock to serialize hotplug events
X-Git-Tag: v3.15-rc1~143^2~4^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=50b52fdee050745935d92e7026373edea2647e60;p=pandora-kernel.git

PCI: pciehp: Add hotplug_lock to serialize hotplug events

Today it is there is no protection around pciehp_enable_slot() and
pciehp_disable_slot() to ensure that they complete before another
hot-plug operation can be done on that particular slot.

This patch introduces the slot->hotplug_lock to ensure that any hotplug
operations (add / remove) complete before another hotplug event can begin
processing on that particular slot.

Signed-off-by: Rajat Jain <rajatxjain@gmail.com>
Signed-off-by: Rajat Jain <rajatjain@juniper.net>
Signed-off-by: Guenter Roeck <groeck@juniper.net>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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