PCI: fix 64-vbit prefetchable memory resource BARs

Since patch 6ac665c6 my infiniband
controller hasn't worked.  This is because it has 64-bit prefetchable
memory, which was mistakenly being  taken to be 32-bit memory.  The
resource flags in this case are PCI_BASE_ADDRESS_MEM_TYPE_64 |
PCI_BASE_ADDRESS_MEM_PREFETCH.

This patch checks only for the PCI_BASE_ADDRESS_MEM_TYPE_64 bit; thus
whether the region is prefetchable or not is ignored.  This fixes my
Infiniband.
Reviewed-by: NMatthew Wilcox <matthew@wil.cx>
Signed-off-by: NPeter Chubb <peterc@gelato.unsw.edu.au>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/probe.c

@@ -217,7 +217,7 @@ static inline enum pci_bar_type decode_bar(struct resource *res, u32 bar)
 
 	res->flags = bar & ~PCI_BASE_ADDRESS_MEM_MASK;
 
-	if (res->flags == PCI_BASE_ADDRESS_MEM_TYPE_64)
+	if (res->flags & PCI_BASE_ADDRESS_MEM_TYPE_64)
 		return pci_bar_mem64;
 	return pci_bar_mem32;
 }