From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Date: Mon, 3 Feb 2014 01:22:07 +0000 (+0100)
Subject: ACPI / hotplug / PCI: Remove entries from bus->devices in reverse order
X-Git-Tag: v3.14-rc2~16^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2d7c1b77dd59387070aab355532dd157f888325c;p=pandora-kernel.git

ACPI / hotplug / PCI: Remove entries from bus->devices in reverse order

According to the changelog of commit 29ed1f29b68a (PCI: pciehp: Fix null
pointer deref when hot-removing SR-IOV device) it is unsafe to walk the
bus->devices list of a PCI bus and remove devices from it in direct order,
because that may lead to NULL pointer dereferences related to virtual
functions.

For this reason, change all of the bus->devices list walks in
acpiphp_glue.c during which devices may be removed to be carried out in
reverse order.

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