Now pci device resource iteration is done via "for (i=0...)" open code.
That make code hard to read esp when only bridge or sriov resources
are involved.
We want to replace those open code with for_each_pci_resource().
Also want to add addon_resource handling, and need to make addon resource
to be treated as normal PCI resources during iteration.
Add pci_device_resource_n() instead of using dev->resources[n].
Use it with for_each_pci_resource macro and addon_resource support.
-v2: Add EXPORT_SYMBOL to find building error found by Gary Hade
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
---
drivers/pci/probe.c | 9 +++++++++
include/linux/pci.h | 2 ++
2 files changed, 11 insertions(+)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index b494066..9cb3eb3 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -105,6 +105,15 @@ static int __init pcibus_class_init(void)
}
postcore_initcall(pcibus_class_init);
+struct resource *pci_dev_resource_n(struct pci_dev *dev, int n)
+{
+ if (n >= 0 && n < PCI_NUM_RESOURCES)
+ return &dev->resource[n];
+
+ return NULL;
+}
+EXPORT_SYMBOL(pci_dev_resource_n);
+
static u64 pci_size(u64 base, u64 maxbase, u64 mask)
{
u64 size = mask & maxbase; /* Find the significant bits */
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 2461033a..00d5367 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -338,6 +338,8 @@ struct pci_dev {
size_t romlen; /* Length of ROM if it's not from the BAR */
};
+struct resource *pci_dev_resource_n(struct pci_dev *dev, int n);
+
static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
{
#ifdef CONFIG_PCI_IOV
--
1.7.10.4
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