m68k/amiga: Chip RAM - Use lookup_resource()

Replace a custom implementation (which doesn't lock the resource tree) by a
call to lookup_resource()

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

1 files changed, 11 insertions, 11 deletions

diff --git a/arch/m68k/amiga/chipram.c b/arch/m68k/amiga/chipram.c
index 4790f77cbd48..99449fbf9a72 100644
--- a/arch/m68k/amiga/chipram.c
+++ b/arch/m68k/amiga/chipram.c
@@ -93,21 +93,21 @@ void *amiga_chip_alloc_res(unsigned long size, struct resource *res)
 void amiga_chip_free(void *ptr)
 {
         unsigned long start = ZTWO_PADDR(ptr);
-        struct resource **p, *res;
+        struct resource *res;
         unsigned long size;
 
-        for (p = &chipram_res.child; (res = *p); p = &res->sibling) {
-                if (res->start != start)
-                        continue;
-                *p = res->sibling;
-                size = resource_size(res);
-                pr_debug("amiga_chip_free: free %lu bytes at %p\n", size, ptr);
-                atomic_add(size, &chipavail);
-                kfree(res);
+        res = lookup_resource(&chipram_res, start);
+        if (!res) {
+                pr_err("amiga_chip_free: trying to free nonexistent region at "
+                       "%p\n", ptr);
                 return;
         }
-        pr_err("amiga_chip_free: trying to free nonexistent region at %p\n",
-               ptr);
+
+        size = resource_size(res);
+        pr_debug("amiga_chip_free: free %lu bytes at %p\n", size, ptr);
+        atomic_add(size, &chipavail);
+        release_resource(res);
+        kfree(res);
 }
 EXPORT_SYMBOL(amiga_chip_free);