PCI: Don't convert BAR address to resource if dma_addr_t is too small

If dma_addr_t is too small to represent the BAR value,
pcibios_bus_to_resource() will fail, so just remember the BAR size directly
in the resource.  The resource is already marked UNSET, so we know the
address isn't valid anyway.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index afae3bf405fa..82cd75f6118a 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -258,9 +258,10 @@ int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
                         pci_write_config_dword(dev, pos, 0);
                         pci_write_config_dword(dev, pos + 4, 0);
                         res->flags |= IORESOURCE_UNSET;
-                        region.start = 0;
-                        region.end = sz64;
+                        res->start = 0;
+                        res->end = sz64;
                         bar_disabled = true;
+                        goto out;
                 } else {
                         region.start = l64;
                         region.end = l64 + sz64;