[PATCH 03/18] pci: add pci_select_bars() helper

[Sascha Hauer]

pci_select_bars() will be needed later in the updated RTL8169 driver.

Signed-off-by: Sascha Hauer <s.hauer at pengutronix.de>
---
 drivers/pci/pci.c   | 16 ++++++++++++++++
 include/linux/pci.h |  1 +
 2 files changed, 17 insertions(+)

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index 53e8faeb3e..57a7a75f84 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -539,6 +539,22 @@ int pci_enable_device(struct pci_dev *dev)
 }
 EXPORT_SYMBOL(pci_enable_device);
 
+/**
+ * pci_select_bars - Make BAR mask from the type of resource
+ * @dev: the PCI device for which BAR mask is made
+ * @flags: resource type mask to be selected
+ *
+ * This helper routine makes bar mask from the type of resource.
+ */
+int pci_select_bars(struct pci_dev *dev, unsigned long flags)
+{
+	int i, bars = 0;
+	for (i = 0; i < PCI_NUM_RESOURCES; i++)
+		if (pci_resource_flags(dev, i) & flags)
+			bars |= (1 << i);
+	return bars;
+}
+
 static u8 __pci_find_next_cap_ttl(struct pci_bus *bus, unsigned int devfn,
 				  u8 pos, int cap, int *ttl)
 {
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 31488bf8ac..98d056624f 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -326,6 +326,7 @@ static inline int pci_write_config_dword(const struct pci_dev *dev, int where,
 void pci_set_master(struct pci_dev *dev);
 void pci_clear_master(struct pci_dev *dev);
 int pci_enable_device(struct pci_dev *dev);
+int pci_select_bars(struct pci_dev *dev, unsigned long flags);
 
 u8 pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
 u8 pci_find_capability(struct pci_dev *dev, int cap);
-- 
2.39.2