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

commit fc2798502f860b18f3c7121e4dc659d3d9d28d74 upstream.

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>
Cc: Dirk Behme <dirk.behme@gmail.com>
[lizf: Backported to 3.4:
 - make changes to pci_host_bridge() instead of find_pci_root_bus()
 - adjust context]
Signed-off-by: Zefan Li <lizefan@huawei.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/arch/sparc/kernel/pci.c b/arch/sparc/kernel/pci.c
index 8c5c9a5675b4..ab5f471aa6e9 100644
--- a/arch/sparc/kernel/pci.c
+++ b/arch/sparc/kernel/pci.c
@@ -409,7 +409,7 @@ static void __devinit pci_cfg_fake_ranges(struct pci_dev *dev,
 		res2.flags = res->flags;
 		region.start = base;
 		region.end = limit + 0xfff;
-		pcibios_bus_to_resource(dev, &res2, &region);
+		pcibios_bus_to_resource(dev->bus, &res2, &region);
 		if (!res->start)
 			res->start = res2.start;
 		if (!res->end)
@@ -427,7 +427,7 @@ static void __devinit pci_cfg_fake_ranges(struct pci_dev *dev,
 			      IORESOURCE_MEM);
 		region.start = base;
 		region.end = limit + 0xfffff;
-		pcibios_bus_to_resource(dev, res, &region);
+		pcibios_bus_to_resource(dev->bus, res, &region);
 	}
 
 	pci_read_config_word(dev, PCI_PREF_MEMORY_BASE, &mem_base_lo);
@@ -458,7 +458,7 @@ static void __devinit pci_cfg_fake_ranges(struct pci_dev *dev,
 			      IORESOURCE_MEM | IORESOURCE_PREFETCH);
 		region.start = base;
 		region.end = limit + 0xfffff;
-		pcibios_bus_to_resource(dev, res, &region);
+		pcibios_bus_to_resource(dev->bus, res, &region);
 	}
 }
 
@@ -480,7 +480,7 @@ static void __devinit apb_fake_ranges(struct pci_dev *dev,
 	res->flags = IORESOURCE_IO;
 	region.start = (first << 21);
 	region.end = (last << 21) + ((1 << 21) - 1);
-	pcibios_bus_to_resource(dev, res, &region);
+	pcibios_bus_to_resource(dev->bus, res, &region);
 
 	pci_read_config_byte(dev, APB_MEM_ADDRESS_MAP, &map);
 	apb_calc_first_last(map, &first, &last);
@@ -488,7 +488,7 @@ static void __devinit apb_fake_ranges(struct pci_dev *dev,
 	res->flags = IORESOURCE_MEM;
 	region.start = (first << 29);
 	region.end = (last << 29) + ((1 << 29) - 1);
-	pcibios_bus_to_resource(dev, res, &region);
+	pcibios_bus_to_resource(dev->bus, res, &region);
 }
 
 static void __devinit pci_of_scan_bus(struct pci_pbm_info *pbm,
@@ -579,7 +579,7 @@ static void __devinit of_scan_pci_bridge(struct pci_pbm_info *pbm,
 		res->flags = flags;
 		region.start = GET_64BIT(ranges, 1);
 		region.end = region.start + size - 1;
-		pcibios_bus_to_resource(dev, res, &region);
+		pcibios_bus_to_resource(dev->bus, res, &region);
 	}
 after_ranges:
 	sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),