PCI: Restore PCI expansion ROM P2P prefetch window creation

Restore PCI expansion ROM P2P prefetch window creation.

This patch reverts previous "Avoid creating P2P prefetch
window for expansion ROMs" change due to regressions that
were spotted on some systems.

Signed-off-by: Gary Hade <garyhade@us.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index c2f8a78c894c..2f75d695eed7 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -276,7 +276,8 @@ static void pci_read_bases(struct pci_dev *dev, unsigned int howmany, int rom)
                         sz = pci_size(l, sz, (u32)PCI_ROM_ADDRESS_MASK);
                         if (sz) {
                                 res->flags = (l & IORESOURCE_ROM_ENABLE) |
-                                  IORESOURCE_MEM | IORESOURCE_READONLY;
+                                  IORESOURCE_MEM | IORESOURCE_PREFETCH |
+                                  IORESOURCE_READONLY | IORESOURCE_CACHEABLE;
                                 res->start = l & PCI_ROM_ADDRESS_MASK;
                                 res->end = res->start + (unsigned long) sz;
                         }