[PATCH 02/13] PCI: Introduce new pci_is_bridge() helper function
From: Yijing Wang <hidden>
Date: 2014-04-25 09:26:04
Also in:
lkml, sparclinux
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
PCIe Spec define the PCI bridge is the PCI device which header type(bit 0 through 6) is 0x1(PCI bridge) or 0x2(CardBus bridge). Signed-off-by: Yijing Wang <redacted> --- include/linux/pci.h | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index aab57b4..827077a 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h@@ -477,6 +477,12 @@ static inline bool pci_is_root_bus(struct pci_bus *pbus) return !(pbus->parent); } +static inline bool pci_is_bridge(struct pci_dev *dev) +{ + return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE || + dev->hdr_type == PCI_HEADER_TYPE_CARDBUS; +} + static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev) { dev = pci_physfn(dev);
--
1.7.1