[PATCH 1/3] PCI: add helper pci_dev_id

[Heiner Kallweit <hkallweit1@gmail.com>]

In several places in the kernel we find PCI_DEVID used like this:
PCI_DEVID(dev->bus->number, dev->devfn) Therefore create a helper
for it.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
---
 include/linux/pci.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 2c056a7a7..28d0313a3 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -598,6 +598,11 @@ struct pci_bus {
 
 #define to_pci_bus(n)	container_of(n, struct pci_bus, dev)
 
+static inline u16 pci_dev_id(struct pci_dev *dev)
+{
+	return PCI_DEVID(dev->bus->number, dev->devfn);
+}
+
 /*
  * Returns true if the PCI bus is root (behind host-PCI bridge),
  * false otherwise
-- 
2.21.0