PCI: fix 64-vbit prefetchable memory resource BARs
Peter Chubb [Mon, 13 Oct 2008 00:49:04 +0000 (11:49 +1100)]
Since patch 6ac665c63dcac8fcec534a1d224ecbb8b867ad59 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: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

drivers/pci/probe.c

index f6754e8..49599ac 100644 (file)
@@ -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;
 }