PCI: Separate pci_bus_read_dev_vendor_id from pci_scan_device

We can reuse it for pciehp probing.

-v2: according to Kenji, fix crs timeout checking, and export the function
     for later use when pciehp is compiled as a module.

Suggested-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index 1009a5e88e53..aaf7ff8c517f 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -207,6 +207,8 @@ enum pci_bar_type {
         pci_bar_mem64,          /* A 64-bit memory BAR */
 };
 
+bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
+                                int crs_timeout);
 extern int pci_setup_device(struct pci_dev *dev);
 extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
                                 struct resource *res, unsigned int reg);