PCI: add pci_bus_for_each_resource(), remove direct bus->resource[] refs

No functional change; this converts loops that iterate from 0 to
PCI_BUS_NUM_RESOURCES through pci_bus resource[] table to use the
pci_bus_for_each_resource() iterator instead.

This doesn't change the way resources are stored; it merely removes
dependencies on the fact that they're in a table.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

4 files changed, 11 insertions, 17 deletions

diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index a26135bb0ffd..e75d219fd107 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -43,6 +43,7 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
                 void *alignf_data)
 {
         int i, ret = -ENOMEM;
+        struct resource *r;
         resource_size_t max = -1;
 
         type_mask |= IORESOURCE_IO | IORESOURCE_MEM;
@@ -51,8 +52,7 @@ pci_bus_alloc_resource(struct pci_bus *bus, struct resource *res,
         if (!(res->flags & IORESOURCE_MEM_64))
                 max = PCIBIOS_MAX_MEM_32;
 
-        for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
-                struct resource *r = bus->resource[i];
+        pci_bus_for_each_resource(bus, r, i) {
                 if (!r)
                         continue;
 
diff --git a/drivers/pci/hotplug/shpchp_sysfs.c b/drivers/pci/hotplug/shpchp_sysfs.c
index 29fa9d26adae..071b7dc0094b 100644
--- a/drivers/pci/hotplug/shpchp_sysfs.c
+++ b/drivers/pci/hotplug/shpchp_sysfs.c
@@ -47,8 +47,7 @@ static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, cha
         bus = pdev->subordinate;
 
         out += sprintf(buf, "Free resources: memory\n");
-        for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) {
-                res = bus->resource[index];
+        pci_bus_for_each_resource(bus, res, index) {
                 if (res && (res->flags & IORESOURCE_MEM) &&
                                 !(res->flags & IORESOURCE_PREFETCH)) {
                         out += sprintf(out, "start = %8.8llx, "
@@ -58,8 +57,7 @@ static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, cha
                 }
         }
         out += sprintf(out, "Free resources: prefetchable memory\n");
-        for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) {
-                res = bus->resource[index];
+        pci_bus_for_each_resource(bus, res, index) {
                 if (res && (res->flags & IORESOURCE_MEM) &&
                                (res->flags & IORESOURCE_PREFETCH)) {
                         out += sprintf(out, "start = %8.8llx, "
@@ -69,8 +67,7 @@ static ssize_t show_ctrl (struct device *dev, struct device_attribute *attr, cha
                 }
         }
         out += sprintf(out, "Free resources: IO\n");
-        for (index = 0; index < PCI_BUS_NUM_RESOURCES; index++) {
-                res = bus->resource[index];
+        pci_bus_for_each_resource(bus, res, index) {
                 if (res && (res->flags & IORESOURCE_IO)) {
                         out += sprintf(out, "start = %8.8llx, "
                                         "length = %8.8llx\n",
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index d62a5de81672..f4a2738bf0bf 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -386,10 +386,9 @@ pci_find_parent_resource(const struct pci_dev *dev, struct resource *res)
 {
         const struct pci_bus *bus = dev->bus;
         int i;
-        struct resource *best = NULL;
+        struct resource *best = NULL, *r;
 
-        for(i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
-                struct resource *r = bus->resource[i];
+        pci_bus_for_each_resource(bus, r, i) {
                 if (!r)
                         continue;
                 if (res->start && !(res->start >= r->start && res->end <= r->end))
diff --git a/drivers/pci/setup-bus.c b/drivers/pci/setup-bus.c
index 743ed8c48b9c..bf32f07c4efb 100644
--- a/drivers/pci/setup-bus.c
+++ b/drivers/pci/setup-bus.c
@@ -387,8 +387,7 @@ static struct resource *find_free_bus_resource(struct pci_bus *bus, unsigned lon
         unsigned long type_mask = IORESOURCE_IO | IORESOURCE_MEM |
                                   IORESOURCE_PREFETCH;
 
-        for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
-                r = bus->resource[i];
+        pci_bus_for_each_resource(bus, r, i) {
                 if (r == &ioport_resource || r == &iomem_resource)
                         continue;
                 if (r && (r->flags & type_mask) == type && !r->parent)
@@ -803,11 +802,10 @@ static void __ref pci_bus_release_bridge_resources(struct pci_bus *bus,
 
 static void pci_bus_dump_res(struct pci_bus *bus)
 {
-        int i;
-
-        for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
-                struct resource *res = bus->resource[i];
+        struct resource *res;
+        int i;
 
+        pci_bus_for_each_resource(bus, res, i) {
                 if (!res || !res->end || !res->flags)
                         continue;