ACPI/PCI: PCI extended config _OSC support called when root bridge added
The _OSC capability OSC_EXT_PCI_CONFIG_SUPPORT is set when the root
bridge is added with pci_acpi_osc_support() if we can access PCI
extended config space.
This adds the function pci_ext_cfg_avail which returns true if we can
access PCI extended config space (offset greater than 0xff). It
currently only returns false if arch=x86 and raw_pci_ext_ops is not set
(which might happen if pci=nommcfg is set on the kernel command-line).
Signed-off-by: Andrew Patterson <andrew.patterson@hp.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 4bb156b..6fd4765 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1140,6 +1140,8 @@
static inline void pci_mmcfg_late_init(void) { }
#endif
+int pci_ext_cfg_avail(struct pci_dev *dev);
+
#ifdef CONFIG_HAS_IOMEM
static inline void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar)
{
