PCI: handle 64-bit resources better on 32-bit machines

If the kernel is configured to support 64-bit resources on a 32-bit
machine, we can support 64-bit BARs properly.  Just change the condition
to check sizeof(resource_size_t) instead of BITS_PER_LONG.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 3b690c3512f3..203630065839 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -270,10 +270,10 @@ static int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
                 if (!sz64)
                         goto fail;
 
-                if ((BITS_PER_LONG < 64) && (sz64 > 0x100000000ULL)) {
+                if ((sizeof(resource_size_t) < 8) && (sz64 > 0x100000000ULL)) {
                         dev_err(&dev->dev, "can't handle 64-bit BAR\n");
                         goto fail;
-                } else if ((BITS_PER_LONG < 64) && l) {
+                } else if ((sizeof(resource_size_t) < 8) && l) {
                         /* Address above 32-bit boundary; disable the BAR */
                         pci_write_config_dword(dev, pos, 0);
                         pci_write_config_dword(dev, pos + 4, 0);