PCI: Convert pcibios_resource_to_bus() to take a pci_bus, not a pci_dev

These interfaces:

  pcibios_resource_to_bus(struct pci_dev *dev, *bus_region, *resource)
  pcibios_bus_to_resource(struct pci_dev *dev, *resource, *bus_region)

took a pci_dev, but they really depend only on the pci_bus.  And we want to
use them in resource allocation paths where we have the bus but not a
device, so this patch converts them to take the pci_bus instead of the
pci_dev:

  pcibios_resource_to_bus(struct pci_bus *bus, *bus_region, *resource)
  pcibios_bus_to_resource(struct pci_bus *bus, *resource, *bus_region)

In fact, with standard PCI-PCI bridges, they only depend on the host
bridge, because that's the only place address translation occurs, but
we aren't going that far yet.

[bhelgaas: changelog]
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c
index bac55f7f69f9..6d3ee1ab6362 100644
--- a/drivers/scsi/sym53c8xx_2/sym_glue.c
+++ b/drivers/scsi/sym53c8xx_2/sym_glue.c
@@ -1531,7 +1531,7 @@ static int sym_iomap_device(struct sym_device *device)
         struct pci_bus_region bus_addr;
         int i = 2;
 
-        pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[1]);
+        pcibios_resource_to_bus(pdev->bus, &bus_addr, &pdev->resource[1]);
         device->mmio_base = bus_addr.start;
 
         if (device->chip.features & FE_RAM) {
@@ -1541,7 +1541,8 @@ static int sym_iomap_device(struct sym_device *device)
                  */
                 if (!pdev->resource[i].flags)
                         i++;
-                pcibios_resource_to_bus(pdev, &bus_addr, &pdev->resource[i]);
+                pcibios_resource_to_bus(pdev->bus, &bus_addr,
+                                        &pdev->resource[i]);
                 device->ram_base = bus_addr.start;
         }