tree 0739f5a0135b070c7626542ffd593074341d950b
parent c4f2f5e4981073a5aa0739f93b6733060cd37648
author Rajat Jain <rajatxjain@gmail.com> 1391567471 -0800
committer Bjorn Helgaas <bhelgaas@google.com> 1392160396 -0700

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>