From: David Woodhouse <dwmw@amazon.co.uk>
Date: Wed, 12 Apr 2017 12:25:52 +0000 (+0100)
Subject: PCI: Only allow WC mmap on prefetchable resources
X-Git-Tag: v3.2.92~31
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=999df205ec3140149a8eb56dfaefa0946e72327d;p=pandora-kernel.git

PCI: Only allow WC mmap on prefetchable resources

commit cef4d02305a06be581bb7f4353446717a1b319ec upstream.

The /proc/bus/pci mmap interface allows the user to specify whether they
want WC or not.  Don't let them do so on non-prefetchable BARs.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---

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