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parisc/PCI: lba: deal with LMMIO/PAT overlaps before creating PCI root bus 

This moves the truncate_pat_collision() call out of the pcibios_fixup_bus()
path so that when a future patch builds a list of root bus resources for
pci_create_bus(), it can use the truncated LMMIO range.

truncate_pat_collision() used to be called in this path:

    pci_scan_bus_parented
      pci_create_bus
      pci_scan_child_bus
        pcibios_fixup_bus
	  lba_fixup_bus
	    truncate_pat_collision

All of the PAT and lba_dev resource setup must be done before we call
pci_scan_bus_parented(), so it should be safe to move the
truncate_pat_collision() to just before pci_scan_bus_parented().

CC: linux-parisc@vger.kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Bjorn Helgaas 2011-10-28 16:27:17 -06:00 committed by Jesse Barnes
parent 7590e500ad
commit f4d9ea9abf
1 changed files with 18 additions and 17 deletions
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35
drivers/parisc/lba_pci.c
View File

@ -689,23 +689,7 @@ lba_fixup_bus(struct pci_bus *bus)
bus->resource[i++] = &(ldev->hba.elmmio_space);
}
/* Overlaps with elmmio can (and should) fail here.
* We will prune (or ignore) the distributed range.
*
* FIXME: SBA code should register all elmmio ranges first.
* that would take care of elmmio ranges routed
* to a different rope (already discovered) from
* getting registered *after* LBA code has already
* registered it's distributed lmmio range.
*/
if (truncate_pat_collision(&iomem_resource,
&(ldev->hba.lmmio_space))) {
printk(KERN_WARNING "LBA: lmmio_space [%lx/%lx] duplicate!\n",
(long)ldev->hba.lmmio_space.start,
(long)ldev->hba.lmmio_space.end);
} else {
if (ldev->hba.lmmio_space.flags) {
err = request_resource(&iomem_resource, &(ldev->hba.lmmio_space));
if (err < 0) {
printk(KERN_ERR "FAILED: lba_fixup_bus() request for "
@ -1518,6 +1502,23 @@ lba_driver_probe(struct parisc_device *dev)
if (lba_dev->hba.bus_num.start < lba_next_bus)
lba_dev->hba.bus_num.start = lba_next_bus;
/* Overlaps with elmmio can (and should) fail here.
* We will prune (or ignore) the distributed range.
*
* FIXME: SBA code should register all elmmio ranges first.
* that would take care of elmmio ranges routed
* to a different rope (already discovered) from
* getting registered *after* LBA code has already
* registered it's distributed lmmio range.
*/
if (truncate_pat_collision(&iomem_resource,
&(lba_dev->hba.lmmio_space))) {
printk(KERN_WARNING "LBA: lmmio_space [%lx/%lx] duplicate!\n",
(long)lba_dev->hba.lmmio_space.start,
(long)lba_dev->hba.lmmio_space.end);
lba_dev->hba.lmmio_space.flags = 0;
}
dev->dev.platform_data = lba_dev;
lba_bus = lba_dev->hba.hba_bus =
pci_scan_bus_parented(&dev->dev, lba_dev->hba.bus_num.start,