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powerpc/PCI: convert devtree bus addresses to resource

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Normal PCI enumeration via PCI config space uses __pci_read_base(), where
the PCI core applies any bus-to-resource offset.  But powerpc doesn't use
that path when enumerating via the device tree.

In 6c5705fec6, I converted powerpc to use the PCI core bus-to-resource
conversion, but I missed these powerpc-specific paths.  Some powerpc
platforms fail to boot ("Cannot allocate resource region," "device not
available," etc.) between that commit and this one.

This adds the corresponding bus-to-resource conversion in the paths that
read BAR values from the OF device tree.

CC: Anton Blanchard <anton@samba.org>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: linuxppc-dev@lists.ozlabs.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Bjorn Helgaas 2012-03-16 17:48:14 -06:00 committed by Jesse Barnes
parent 38973ba790
commit 39aa146aad
1 changed files with 8 additions and 4 deletions
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12
arch/powerpc/kernel/pci_of_scan.c
View file

@ -75,6 +75,7 @@ static void of_pci_parse_addrs(struct device_node *node, struct pci_dev *dev)
{
u64 base, size;
unsigned int flags;
struct pci_bus_region region;
struct resource *res;
const u32 *addrs;
u32 i;
@ -106,10 +107,11 @@ static void of_pci_parse_addrs(struct device_node *node, struct pci_dev *dev)
printk(KERN_ERR "PCI: bad cfg reg num 0x%x\n", i);
continue;
}
res->start = base;
res->end = base + size - 1;
res->flags = flags;
res->name = pci_name(dev);
region.start = base;
region.end = base + size - 1;
pcibios_bus_to_resource(dev, res, &region);
}
}
@ -209,6 +211,7 @@ void __devinit of_scan_pci_bridge(struct pci_dev *dev)
struct pci_bus *bus;
const u32 *busrange, *ranges;
int len, i, mode;
struct pci_bus_region region;
struct resource *res;
unsigned int flags;
u64 size;
@ -270,9 +273,10 @@ void __devinit of_scan_pci_bridge(struct pci_dev *dev)
res = bus->resource[i];
++i;
}
res->start = of_read_number(&ranges[1], 2);
res->end = res->start + size - 1;
res->flags = flags;
region.start = of_read_number(&ranges[1], 2);
region.end = region.start + size - 1;
pcibios_bus_to_resource(dev, res, &region);
}
sprintf(bus->name, "PCI Bus %04x:%02x", pci_domain_nr(bus),
bus->number);