From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Sat, 13 Jul 2013 21:27:26 +0000 (+0200)
Subject: ACPI / hotplug / PCI: Clean up bridge_mutex usage
X-Git-Tag: v3.12-rc1~178^2~16^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ff181e5a4f6b536e5f3f1601cd5c54e792cd9abc;p=pandora-kernel.git

ACPI / hotplug / PCI: Clean up bridge_mutex usage

Do not acquire bridge_mutex around the addition of a slot to its
bridge's list of slots and arount the addition of a function to
its slot's list of functions, because that doesn't help anything
right now (those lists are walked without any locking anyway).

However, acquire bridge_mutex around the list walk in
acpiphp_remove_slots() and use list_for_each_entry() there,
because we terminate the walk as soon as we find the first matching
entry.  This prevents that list walk from colliding with bridge
addition and removal.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
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