From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Yinghai Lu To: Bjorn Helgaas , Ram Pai Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Yinghai Lu Subject: [PATCH v3 02/27] PCI: Add pci_dev_resource_idx() helper Date: Wed, 13 Mar 2013 16:27:57 -0700 Message-Id: <1363217302-14383-3-git-send-email-yinghai@kernel.org> In-Reply-To: <1363217302-14383-1-git-send-email-yinghai@kernel.org> References: <1363217302-14383-1-git-send-email-yinghai@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: Use resource pointer to get index in pci resources array/list. -v2: export symbol for acpiphp compiling error, found by Steven Newbury Signed-off-by: Yinghai Lu --- 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 00d5367..aefff8b 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -339,6 +339,7 @@ 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) { -- 1.7.10.4