linux-kernel - [PATCH -v2 03/26] PCI: Add pci_dev_resource

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Date:	Sun, 18 Mar 2012 22:48:26 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	Jesse Barnes <jbarnes@...tuousgeek.org>, x86 <x86@...nel.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH -v2 03/26] PCI: Add pci_dev_resource_idx()

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 drivers/pci/probe.c |   12 ++++++++++++
 include/linux/pci.h |    1 +
 2 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 87e87b5..7d5550a 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -85,6 +85,18 @@ struct resource *pci_dev_resource_n(struct pci_dev *dev, int n)
 	return NULL;
 }
 
+int pci_dev_resource_idx(struct pci_dev *dev, struct resource *res)
+{
+	int i;
+	struct resource *r;
+
+	for_each_pci_dev_all_resource(dev, r, i)
+		if (r == res)
+			return i;
+
+	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 2b1fff8..e3f9ae1 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -348,6 +348,7 @@ 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);
 
 #define resno_is_for_bridge(n)						\
 	((n) >= PCI_BRIDGE_RESOURCES && (n) <= PCI_BRIDGE_RESOURCE_END)
-- 
1.7.7

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