Messages in this thread Patch in this message | | | From | Yinghai Lu <> | Subject | [PATCH v4 04/29] PCI: Add pci_dev_resource_idx() helper | Date | Fri, 12 Apr 2013 15:44:18 -0700 |
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Use resource pointer to get index in pci resources array/list.
-v2: export symbol for acpiphp compiling error, found by Steven Newbury <steve@snewbury.org.uk>
Signed-off-by: Yinghai Lu <yinghai@kernel.org> --- drivers/pci/probe.c | 9 +++++++++ include/linux/pci.h | 1 + 2 files changed, 10 insertions(+)
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 9cb3eb3..1df75f7 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -114,6 +114,15 @@ struct resource *pci_dev_resource_n(struct pci_dev *dev, int n) } EXPORT_SYMBOL(pci_dev_resource_n); +int pci_dev_resource_idx(struct pci_dev *dev, struct resource *res) +{ + if (res >= dev->resource && + res <= dev->resource + (PCI_NUM_RESOURCES - 1)) + return res - dev->resource; + + return -1; +} + 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 6d450d2..f4da78d 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -354,6 +354,7 @@ struct pci_dev { }; struct resource *pci_dev_resource_n(struct pci_dev *dev, int n); +int pci_dev_resource_idx(struct pci_dev *dev, struct resource *res); static inline struct pci_dev *pci_physfn(struct pci_dev *dev) { -- 1.8.1.4
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