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authorBjorn Helgaas <bhelgaas@google.com>2011-10-28 16:25:50 -0600
committerJesse Barnes <jbarnes@virtuousgeek.org>2012-01-06 12:10:52 -0800
commita2ebb827958a4ab3577443f89037f229683c644a (patch)
treec1e44c472315f75c8ba9d147e3712db1e9017a1e /drivers/pci
parent166c6370754a0a92386e2ffb0eeb06e50ac8588d (diff)
downloadlinux-a2ebb827958a4ab3577443f89037f229683c644a.tar.bz2
PCI: add pci_scan_root_bus() that accepts resource list
"Early" and "header" quirks often use incorrect bus resources because they see the default resources assigned by pci_create_bus(), before the architecture fixes them up (typically in pcibios_fixup_bus()). Regions reserved by these quirks end up with the wrong parents. Here's the standard path for scanning a PCI root bus: pci_scan_bus or pci_scan_bus_parented pci_create_bus <-- A create with default resources pci_scan_child_bus pci_scan_slot pci_scan_single_device pci_scan_device pci_setup_device pci_fixup_device(early) <-- B pci_device_add pci_fixup_device(header) <-- C pcibios_fixup_bus <-- D fill in correct resources Early and header quirks at B and C use the default (incorrect) root bus resources rather than those filled in at D. This patch adds a new pci_scan_root_bus() function that sets the bus resources correctly from a supplied list of resources. I intend to remove pci_scan_bus() and pci_scan_bus_parented() after fixing all callers. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci')
-rw-r--r--drivers/pci/probe.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 89ecded0581b..7fc7e14118cc 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1608,6 +1608,21 @@ err_out:
return NULL;
}
+struct pci_bus * __devinit pci_scan_root_bus(struct device *parent, int bus,
+ struct pci_ops *ops, void *sysdata, struct list_head *resources)
+{
+ struct pci_bus *b;
+
+ b = pci_create_root_bus(parent, bus, ops, sysdata, resources);
+ if (!b)
+ return NULL;
+
+ b->subordinate = pci_scan_child_bus(b);
+ pci_bus_add_devices(b);
+ return b;
+}
+EXPORT_SYMBOL(pci_scan_root_bus);
+
struct pci_bus *pci_create_bus(struct device *parent,
int bus, struct pci_ops *ops, void *sysdata)
{