diff options
author | Bjorn Helgaas <bhelgaas@google.com> | 2011-10-28 16:25:50 -0600 |
---|---|---|
committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2012-01-06 12:10:52 -0800 |
commit | a2ebb827958a4ab3577443f89037f229683c644a (patch) | |
tree | c1e44c472315f75c8ba9d147e3712db1e9017a1e /drivers/pci | |
parent | 166c6370754a0a92386e2ffb0eeb06e50ac8588d (diff) |
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.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 89ecded0581..7fc7e14118c 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) { |