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authorYinghai Lu <yinghai@kernel.org>2013-12-10 10:54:40 +0400
committerBjorn Helgaas <bhelgaas@google.com>2013-12-21 21:06:10 +0400
commitfc2798502f860b18f3c7121e4dc659d3d9d28d74 (patch)
treed15d6addb41d305e33c6f6d8e363b7272dc29a38 /drivers/pci/host-bridge.c
parent0a5ef7b914be91dd257ae4f35223dd822dd3703a (diff)
downloadlinux-fc2798502f860b18f3c7121e4dc659d3d9d28d74.tar.xz
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>
Diffstat (limited to 'drivers/pci/host-bridge.c')
-rw-r--r--drivers/pci/host-bridge.c19
1 files changed, 8 insertions, 11 deletions
diff --git a/drivers/pci/host-bridge.c b/drivers/pci/host-bridge.c
index a68dc613a5be..06ace6248c61 100644
--- a/drivers/pci/host-bridge.c
+++ b/drivers/pci/host-bridge.c
@@ -9,22 +9,19 @@
#include "pci.h"
-static struct pci_bus *find_pci_root_bus(struct pci_dev *dev)
+static struct pci_bus *find_pci_root_bus(struct pci_bus *bus)
{
- struct pci_bus *bus;
-
- bus = dev->bus;
while (bus->parent)
bus = bus->parent;
return bus;
}
-static struct pci_host_bridge *find_pci_host_bridge(struct pci_dev *dev)
+static struct pci_host_bridge *find_pci_host_bridge(struct pci_bus *bus)
{
- struct pci_bus *bus = find_pci_root_bus(dev);
+ struct pci_bus *root_bus = find_pci_root_bus(bus);
- return to_pci_host_bridge(bus->bridge);
+ return to_pci_host_bridge(root_bus->bridge);
}
void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
@@ -40,10 +37,10 @@ static bool resource_contains(struct resource *res1, struct resource *res2)
return res1->start <= res2->start && res1->end >= res2->end;
}
-void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
+void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
struct resource *res)
{
- struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
+ struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
struct pci_host_bridge_window *window;
resource_size_t offset = 0;
@@ -68,10 +65,10 @@ static bool region_contains(struct pci_bus_region *region1,
return region1->start <= region2->start && region1->end >= region2->end;
}
-void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
+void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
struct pci_bus_region *region)
{
- struct pci_host_bridge *bridge = find_pci_host_bridge(dev);
+ struct pci_host_bridge *bridge = find_pci_host_bridge(bus);
struct pci_host_bridge_window *window;
resource_size_t offset = 0;