From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yijing Wang Date: Sun, 04 May 2014 04:23:37 +0000 Subject: [PATCH v2 02/13] PCI: Introduce new pci_is_bridge() helper function Message-Id: <1399177428-3784-3-git-send-email-wangyijing@huawei.com> List-Id: References: <1399177428-3784-1-git-send-email-wangyijing@huawei.com> In-Reply-To: <1399177428-3784-1-git-send-email-wangyijing@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Bjorn Helgaas Cc: Benjamin Herrenschmidt , linuxppc-dev@lists.ozlabs.org, linux-pci@vger.kernel.org, Tony Luck , linux-ia64@vger.kernel.org, "David S. Miller" , sparclinux@vger.kernel.org, Thomas Gleixner , x86@kernel.org, Yijing Wang 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 --- include/linux/pci.h | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-) diff --git a/include/linux/pci.h b/include/linux/pci.h index aab57b4..9f5f89e 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -477,6 +477,19 @@ static inline bool pci_is_root_bus(struct pci_bus *pbus) return !(pbus->parent); } +/** + * pci_is_bridge - check if the PCI device is a bridge + * @dev: PCI device + * + * Return true if the PCI device is bridge whether it has subordinate + * or not. + */ +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