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authorLennert Buytenhek <buytenh@wantstofly.org>2005-04-16 15:25:58 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:25:58 -0700
commitb52402c783d8c16b11f146a244bb21086a94bf84 (patch)
tree22b6a4a3623ba2eae08113367eab8b59929f43c0
parentfe4b334f8bcdf5359771666d5002b293212e4d3f (diff)
[PATCH] pci enumeration on ixp2000: overflow in kernel/resource.c
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 <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--kernel/resource.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/resource.c b/kernel/resource.c
index 35c99ac02c7..52f696f11ad 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -266,7 +266,7 @@ static int find_resource(struct resource *root, struct resource *new,
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;
}