sparc: _sparc_find_resource() should check for exact matches
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>
diff --git a/arch/sparc/kernel/ioport.c b/arch/sparc/kernel/ioport.c
index 1c9c80a..b5e83be 100644
--- a/arch/sparc/kernel/ioport.c
+++ b/arch/sparc/kernel/ioport.c
@@ -723,12 +723,12 @@
* This probably warrants some sort of hashing.
*/
static struct resource *_sparc_find_resource(struct resource *root,
- unsigned long hit)
+ unsigned long start)
{
struct resource *tmp;
for (tmp = root->child; tmp != 0; tmp = tmp->sibling) {
- if (tmp->start <= hit && tmp->end >= hit)
+ if (tmp->start == start)
return tmp;
}
return NULL;
