diff --git a/memory.c b/memory.c
index 2f15a4b250..9200b20130 100644
--- a/memory.c
+++ b/memory.c
@@ -1352,35 +1352,24 @@ bool memory_region_access_valid(MemoryRegion *mr,
                                 bool is_write,
                                 MemTxAttrs attrs)
 {
-    int access_size_min, access_size_max;
-    int access_size, i;
+    if (mr->ops->valid.accepts
+        && !mr->ops->valid.accepts(mr->opaque, addr, size, is_write, attrs)) {
+        return false;
+    }
 
     if (!mr->ops->valid.unaligned && (addr & (size - 1))) {
         return false;
     }
 
-    if (!mr->ops->valid.accepts) {
+    /* Treat zero as compatibility all valid */
+    if (!mr->ops->valid.max_access_size) {
         return true;
     }
 
-    access_size_min = mr->ops->valid.min_access_size;
-    if (!mr->ops->valid.min_access_size) {
-        access_size_min = 1;
+    if (size > mr->ops->valid.max_access_size
+        || size < mr->ops->valid.min_access_size) {
+        return false;
     }
-
-    access_size_max = mr->ops->valid.max_access_size;
-    if (!mr->ops->valid.max_access_size) {
-        access_size_max = 4;
-    }
-
-    access_size = MAX(MIN(size, access_size_max), access_size_min);
-    for (i = 0; i < size; i += access_size) {
-        if (!mr->ops->valid.accepts(mr->opaque, addr + i, access_size,
-                                    is_write, attrs)) {
-            return false;
-        }
-    }
-
     return true;
 }