From: Peter Chubb <peterc@gelato.unsw.edu.au>
Date: Mon, 13 Oct 2008 00:49:04 +0000 (+1100)
Subject: PCI: fix 64-vbit prefetchable memory resource BARs
X-Git-Tag: v2.6.27.5~21
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f20f02abf128336b155c31df5144245d849bea5e;p=karo-tx-linux.git

PCI: fix 64-vbit prefetchable memory resource BARs

commit e354597cce8d219d135d65e585dc4f30323486b9 upstream.

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>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 36698e57b97f..bcafbd6c5908 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -219,7 +219,7 @@ 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;
 }