Commit 88efd0bb authored May 07, 2011 by Geert Uytterhoeven

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>

parent 1dad6c7b

arch/sparc/kernel/ioport.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -723,12 +723,12 @@ static const struct file_operations sparc_io_proc_fops = {
		* 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;