From: Lennert Buytenhek <[email protected]>
IXP2000 (ARM-based) platforms use a separate 'struct resource' for PCI MEM
space. Resource allocation for PCI BARs always fails because the 'root'
resource (the IXP2000 PCI MEM resource) always has the entire address space
(00000000-ffffffff) free, and find_resource() calculates the size of that
range as ffffffff-00000000+1=0, so all allocations fail because it thinks
there is no space.
(akpm: pls. double-check)
Signed-off-by: Andrew Morton <[email protected]>
---
25-akpm/kernel/resource.c | 2 +-
1 files changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/resource.c~pci-enumeration-on-ixp2000-overflow-in-kernel-resourcec kernel/resource.c
--- 25/kernel/resource.c~pci-enumeration-on-ixp2000-overflow-in-kernel-resourcec 2005-04-12 03:21:38.435293848 -0700
+++ 25-akpm/kernel/resource.c 2005-04-12 03:21:38.438293392 -0700
@@ -266,7 +266,7 @@ static int find_resource(struct resource
new->start = (new->start + align - 1) & ~(align - 1);
if (alignf)
alignf(alignf_data, new, size, align);
- if (new->start < new->end && new->end - new->start + 1 >= size) {
+ if (new->start < new->end && new->end - new->start >= size - 1) {
new->end = new->start + size - 1;
return 0;
}
_
-
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