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sparc: _sparc_find_resource() should check for exact matches

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The address that's passed to _sparc_find_resource() should always be the
start address of a resource:
  - iounmap() passes a page-aligned virtual address, while the original
    address was created by adding the in-page offset to the resource's
    start address,
  - sbus_free_coherent() and pci32_free_coherent() should be passed an
    address obtained from sbus_alloc_coherent() resp. pci32_alloc_coherent(),
    which is always a resource's start address.

Hence replace the range check by a check for an exact match.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Geert Uytterhoeven 2011-05-07 15:08:36 +02:00
parent 1dad6c7bd7
commit 88efd0bbc0
1 changed files with 2 additions and 2 deletions
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4
arch/sparc/kernel/ioport.c
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@ -723,12 +723,12 @@ static const struct file_operations sparc_io_proc_fops = {
* This probably warrants some sort of hashing. * This probably warrants some sort of hashing.
*/ */
static struct resource *_sparc_find_resource(struct resource *root, static struct resource *_sparc_find_resource(struct resource *root,
unsigned long hit) unsigned long start)
{ {
struct resource *tmp; struct resource *tmp;
for (tmp = root->child; tmp != 0; tmp = tmp->sibling) { for (tmp = root->child; tmp != 0; tmp = tmp->sibling) {
if (tmp->start <= hit && tmp->end >= hit) if (tmp->start == start)
return tmp; return tmp;
} }
return NULL; return NULL;