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| author | Lennert Buytenhek <buytenh@wantstofly.org> | 2005-04-17 00:25:58 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:25:58 +0200 |
| commit | b52402c783d8c16b11f146a244bb21086a94bf84 (patch) | |
| tree | 22b6a4a3623ba2eae08113367eab8b59929f43c0 /kernel/resource.c | |
| parent | [PATCH] CREDITS update (diff) | |
| download | linux-b52402c783d8c16b11f146a244bb21086a94bf84.tar.xz linux-b52402c783d8c16b11f146a244bb21086a94bf84.zip | |
[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>
Diffstat (limited to 'kernel/resource.c')
| -rw-r--r-- | kernel/resource.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/resource.c b/kernel/resource.c index 35c99ac02c7c..52f696f11adf 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; } |